Astm stp 585a 1992

ATMOSPHERIC CORROSION INVESTIGATION OF ALUMINUM-COATED, ZINC-COATED AND COPPER-BEARING STEEL WI RE AN D WI RE PRODUCTS: A TWENTYYEAR REPORT Sponsored by ASTM Committee A-5 on Metallic-Coated Iron and Steel Products John F Occasione Thomas C Britton, Jr Roy C Collins ASTM Special Technical Publication 585A ASTM Publication Code Number (PCN) 04-585010-02 1916 Race Street, Philadelphia, Pa 19103 Library of Congress Cataloging in Publication Data Occasione, John F Atmospheric corrosion investigation of aluminum-coated, zinc-coated, and copper-bearing steel wire and wire products (ASTM special technical publication; 585A) Includes bibliographical references "ASTM publication code number (PCN) 04-585010-02." Steel wire Corrosion Corrosion and anticorrosives I Britton, Thomas C 1951 II Collins, Roy C III ASTM Committee-A-S on MetallicCoated Iron and Steel Products IV Title V Series TA467.028 1984 620.1' 723 83-73647 ISBN 0-8031-0205-4 Copyright by AMERICAN SOCIETY FOR TESTING AND MATERIALS 1984 Library of Congress Catalog Card Number: 83-73647 NOTE The Society is not responsible, as a body, for the statements and opinions advanced in this publication Printed in Ann Arbor Mich August 1984 Second Printing, Philadelphia, PA May 1992 Foreword Committee A-5 on Metallic-Coated Iron and Steel Products I was organized in 1907, to investigate the corrosion of iron and steel In 1908, the Committee sponsored its first atmospheric exposure of metallic-coated wires to evaluate their corrosion resistance Since this date, there have been a considerable number of test programs involving wire, sheet, and hardware Of particular interest is the program initiated in 1936 and reported on in ASTM Special Technical Publication 290 entitled "Twenty-Year Atmospheric Corrosion Investigation of Zinc-Coated and Uncoated Wire and Wire Products" by Fred M Reinhart In June 1959, the Advisory Committee on Corrosion authorized Committee A-5 to conduct atmospheric corrosion tests of aluminum coated wire and wire products at seven ASTM sites in the United States (see map on next page) and an eighth site in Warrington, England The responsibility for the latter site was assumed by Rylands Whitecross Limited Exposure of the wire and wire products specimens was initiated in 1961 For comparative purposes bare copper-bearing steel wire and zinc-coated steel wire and fabricated products were included in the testing program A twelve year report on the 1961 exposure program entitled ASTM STP 585 "Atmospheric Corrosion Investigation of Aluminum-Coated, Zinc-Coated, and Copper-Bearing Steel Wire and Wire Products" by V I Kelley was published in 1975 This report presents the results of 20 years of exposure for the 1961 exposure program, and was prepared by John F Occasione, Thomas C Britton, Jr.,3 and Roy C Collins 1Committee A-S was originally titled "Corrosion of Iron and Steel." 2Retired in 1975 after 41 years with American Steel and Wire, Cleveland, Ohio and the U.S Steel Corp., Pittsburgh, Pa., in various metallurgical positions 3Duke Power Company, Charlotte, N.C 28242 MAP-LOCATION OF TEST SITES IN THE BRAZOI RIVER IdANfl ATTA~,KANBAE ( t o i Z ' N - l)aO 3B'W) UNITED STATES NEWARK KEARNY , N.J ( ~ 4 ' N - ?'4e Oil ' W ) KURE BEACH, N.C ( o OON - "/"/' S4'W ) Copyright by ASTM Int'l (all rights reserved); Fri Jan 23:27:50 EST 2016 Downloaded/printed by University of Washington (University of Washington) pursuant to License Agreement No further reproductions authorized ) POINT Iqfl[ YI[ I I , CALIF (MeOON - I | t e 67' W ) % A Note of Appreciation to Reviewers The quality of this publication reflects not only the obvious efforts of the authors but also the unheralded, though essential, work of the reviewers On behalf of ASTM we acknowledge with appreciation their dedication to high professional standards and their sacrifice of time and effort ASTM C o m m i t t e e on Publications Copyright by ASTM Int'l (all rights reserved); Fri Jan 23:27:50 EST 2016 Downloaded/printed by University of Washington (University of Washington) pursuant to License Agreement No further rep Related ASTM Publications Corrosion of Metals in Association with Concrete, STP 818 (1983), 04818000-27 Atmospheric Corrosion of Metals, STP 767 (1982), 04-767000-27 Corrosion of Reinforcing Steel in Concrete, STP 713 (1980), 04-713000-27 Corrosion Fatigue Technology, STP 642 (1978), 04-642000-27 Copyright by ASTM Int'l (all rights reserved); Fri Jan 23:27:50 EST 2016 Downloaded/printed by University of Washington (University of Washington) pursuant to License Agreement No further reproductions authorized Brief Summary of Results The wire and wire product specimens were exposed at the seven U.S sites in the spring and summer of 1961 and at Warrington, England on March, 1964 There were 340 unfabricated tension test specimens exposed at each of four sites To date, 276 have been removed and tested Wire product specimens (field fence, barbed wire, chain-link fence, and 7-wire strand) were exposed at all eight sites The hot dipped aluminum-coated specimens ranged from 0.08 to 0.19 kg/m (0.27 to 0.63 oz/ft 2) of surface, and the aluminum powder metallurgy clad specimen ranged from 0.54 to 1.39 kg/m (1.76 to 4.54 oz/ft 2) of surface The hot dipped zinc coatings ranged from 0.11 to 0.86 kg/m (0.36 to 2.81 oz/ ft 2) of surface, and the electroplated zinc coatings ranged from 0.27 to 0.91 kg/m (0.87 to 2.98 oz/ft 2) of surface The corrosion rate of the coatings to initial rust on aluminum-coated unfabricated wires ranged from 0.01 kg/m (0.03 oz/ft 2) per year at the Newark, New Jersey, site to 0.02 kg/m (0.07 oz/ft 2) per year at the Warrington, England, site In general the corrosion rates of the coatings to initial rust on aluminum-coated fabricated product specimens was within this range at all locations The corrosion rate of the coatings to initial rust on the zinc-coated unfabricated wire ranged from 0.02 kg/m (0.06 oz/ft 2) per year at State College, Pennsylvania, to 0.06 kg/m (0.20 oz/ft 2) per year at Warrington, England The corrosion rates of the coatings to initial rust on zinc-coated fabricated products varied considerably from a low of 0.01 kg/m (0.03 oz/ft 2) per year at the Manhattan, Kansas, site to a high of 0.12 kg/m (0.38 oz/ft 2) per year at the Kure Beach, North Carolina, 80 ft site The loss in breaking strength over the 20-year period varied considerably from a high in excess of 60% for uncoated and lightly zinc-coated wires exposed at Warrington to some slight gain in strength for some of the heavier aluminum-coated specimens In general, the aluminum-coated wires sustained less loss in strength than the zinc-coated wires Copyright by ASTM Int'l (all rights reserved); Fri Jan 23:27:50 EST 2016 Downloaded/printed by University of Washington (University of Washington) pursuant to License Agreement No further reproductions authorized Acknowledgments The writer wishes to acknowledge and extend thanks to the following people who helped with the compilation and review of this document: H N Alderson, Pacific Gas and Electric Co T C Britton, Duke Power Co., Chairman of A5.15 R C Collins, Duke Power Co S W Dean, Air Products and Chemicals, Inc J I Mickalonis, Bethlehem Steel Corp K E Niewoehner, Bethlehem Steel Corp D C Pearee, Asarco, Inc., Chairman of A-5 L E Peters, Bethlehem Steel Corp (retired) T J Summerson, Kaiser Aluminum and Chemical Corp B G Sweet, Page-Wilson Corp All the Site Inspectors who volunteered their time The Staff people of ASTM who made it all possible Copyright by ASTM Int'l (all rights reserved); Fri Jan 23:27:50 EST 2016 Downloaded/printed by University of Washington (University of Washington) pursuant to License Agreement No further reproductions authori Contents TErr Scope of A-S and Authorization Test Plan Description of the Test Specimens Coating Data 10 Mechanical Properties 11 Materials and ASTM Specifications 22 Inspections of Wire and Wire Products 24 Breaking Strength Loss 39 Summary 5S TABLES Table Exposure sites Table Process description-preparation of test wire Table Base metal analysis Table Mechanical properties of unfabricated wire 23 Table S Description of aluminum wire 24 Table Unfabricated wire 2S Table Farm-field fence 27 Table Barbed wire 30 Copyright by ASTM Int'l (all rights reserved); Fri Jan 23:27:50 EST 2016 Downloaded/printed by University of Washington (University of Washington) pursuant to License Agreement No further reproductions authoriz Years exposure 10 15 [] o 20 F I G Loss in breaking load of unfabricated wires versus years of 20- 40,0 60 / C o d e ~ f c ~ C o d e 1, IR = y e a r s C o d e 2, IR = years Years e x p o s u r e 10 o 15 ,, = C o d e 3, IR = years = E x c l u d e d Point C o d e o= o= 20 F I G Loss in breaking load of unfabricated wires versus years of exposure at Newark, New Jersey o I(D go E (/} r r- o @ 0- Newark, New Jersey Copyright by ASTM Int'l (all rights reserved); Fri Jan 23:27:50 EST 2016 Downloaded/printed by University of Washington (University of Washington) pursuant to License Agreement No further reproductions authorized exposure at Kure Beach, North Carolina, 80Oft lot Q P (1) _go 0~ c o~ r 6o [ ] = Code 1, IR = y e a r s o = Code2, IR = years = Excluded Point Code Kure Beach, 800' Lot, NC Z N < m z C) ~) C) n C) -r rn o0 o -4 ATMOSPHERIC CORROSION INVESTIGATION 43 State College, PA 0- lo _~ D = Code 1, IR = years o = Code 2, IR = 7.9 years 60- o} r'4 r B JO ~ 4O- o 20- I 10 Years exposure 15 20 FIG lO Loss in breaking load of unfabricated wires versus years of exposure at State College, Pennsylvania formed better than the lighter zinc-coated Code wire This results indicates that the rate of loss of breaking loads per year for zinc-coated wire decreased with increase in coating weight At the Warrington site Code 11, gage, 0.08 kg/m (0.27 oz/ft 2) aluminum-coated wire, and Code 17, 121h gage, 0.09 kg/m (0.29 oz/ft 2) aluminum-coated wire, had sufficient data to establish meaningful equations At this site, the Code 11 wire outperformed the Code 17 wire This result indicates that the rate of loss of breaking loads per year for aluminum-coated wire decreased with increased wire diameter While the conclusions drawn here are based on a small sample, they are supported by the earlier work done by Reinhart Breaking Loads Tables 15 through 31 give a summary of breaking loads 3Reinhart, F M., Twenty-Year Atmospheric Corrosion Investigation of Zinc-Coated and Uncoated Wire and Wire Products, A S T M STP 290, American Society for Testing and Materials, 1961 Copyright by ASTM Int'l (all rights reserved); Fri Jan 23:27:50 EST 2016 Downloaded/printed by University of Washington (University of Washington) pursuant to License Agreement No further reproductions authorized 44 ATMOSPHERICCORROSION INVESTIGATION Warrington, England [] = Code 1, IR = years o = Code 2, IR = 2.8 years ~ = Code 3, IR = 4.7 years = Code 11, IR = 4.7 years ~ = Code 17, IR = 4.7 years " = Excluded Point Code 17 / C.,o0e17 C~e2 0- E r 40 [~ / / t A'A Code11 o E # 20, I I I I 10 15 20 Years e x p o s u r e FIG ll Loss in breaking load of unfabricated wires versus years of exposure at Warrington, England Copyright by ASTM Int'l (all rights reserved); Fri Jan 23:27:50 EST 2016 Downloaded/printed by University of Washington (University of Washington) pursuant to License Agreement No further reproductions authorized ATMOSPHERIC CORROSION INVESTIGATION 45 TABLE 15 Breaking loads of wires removed during the 20-year period 1961 to 1981 Code No gage uncoated copper-bearing steel wire, original breaking load I723 lb a %per R,% Breaking Load Exposed, lb Loss, % Year Since IR Years Exposed Years to IR Years Since IR Kure Beach, 800 ft lot 8.0 10.0 12.0 14.0 16.0 17.1 18.2 19.2 20.2 0 0 0 0 8.0 10.0 12.0 14.0 16.0 17.1 18.2 19.2 20.2 100 100 100 100 100 100 100 100 100 1353 1258 1150 1088 901 930 863 853 787 21.5 27.0 33.3 36.9 47.7 46.0 49.9 50.5 54.3 2.7 2.7 2.8 2.6 3.0 2.7 2.7 2.6 2.6 Newark 7.9 9.8 11.9 13.8 15.8 19.1 20.0 0 0 0 7,9 9.8 11.9 13.8 15.8 19.1 20.0 100 100 100 100 100 100 100 1448 1382 1331 1355 1333 1310 1307 16.0 19.8 22.8 21.4 22.6 24.0 24.1 2.0 2.0 1.9 1.6 1.4 1.3 1.2 State College 7.9 9.8 11.9 13.8 15.8 19.1 20.0 0 0 0 7.9 9.8 11.9 13.8 15.8 19.1 20.0 100 100 100 100 100 100 100 1490 1477 1376 1378 1257 1257 1276 13.5 14.3 20.1 20.0 27.0 27.0 25.9 1.7 1.5 1.7 1.4 1.7 1.4 1.3 Warrington 5.8 9.4 10.9 11.6 12.4 12.6 13.2 13.2 0 0 0 0 5.8 9.4 10.9 11.6 12.4 12.6 13.2 13.2 100 100 100 100 100 100 100 100 1102 895 838 772 711 722 608 684 36.0 48.1 51.4 55.2 58.7 58.1 64.7 60.3 6.2 5.1 4.7 4.8 4.7 4.6 4.9 4.6 Location a l l b = 0.45 kg Copyright by ASTM Int'l (all rights reserved); Fri Jan 23:27:50 EST 2016 Downloaded/printed by University of Washington (University of Washington) pursuant to License Agreement No further reproductions autho 46 ATMOSPHERICCORROSION INVESTIGATION TABLE 16 Breaking loads of wires removed during the 20-year period 1961 to 1981 Code No gage zinc-coated steel wire 0.50 oz/ft2, a original breaking load 1487 lb b R, % Breaking Load Exposed, lb Loss, % Year Since IR % per Years Exposed Years to IR Years Since IR Kure Beach, 800 ft lot 8.0 10.0 12.0 14.0 16.0 17.1 19.2 5.0 5.0 5.0 5.0 5.0 5.0 5.0 3.0 5.0 7.0 9.0 11.0 12.1 14.2 99 100 100 100 100 100 100 1023 1350 1330 1190 631 835 699 31.2 9.2 10.6 20.0 57.6 43.8 53.0 10.4 1.8 1.5 2.2 5.2 3.6 3.7 Newark 7.9 9.8 11.9 13.8 15.8 19.1 20.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 4.9 6.8 8.9 10.8 12.8 16.1 17.0 100 100 100 100 100 100 100 1065 1048 711 967 931 917 909 28.4 29.5 52.2 35.0 37.4 38.3 38.9 5.8 4.3 5.9 3.2 2.9 2.4 2.3 State College 9.8 11.9 13.8 15.8 19.1 20.0 7,9 7.9 7.9 7.9 7.9 7.9 1.9 4.0 5.9 7.9 11.2 12.1 100 100 100 100 100 100 1455 1316 1276 1203 1204 1170 2.2 11.5 14.2 19.1 19.0 21.3 1.2 2.9 2.4 2.4 1.7 1.8 Warrington 5.8 9.4 10.9 11.6 2.8 2.8 2.8 2.8 3.0 6.6 8.1 8.8 100 100 100 100 930 633 523 464 37.5 57.4 64.8 68.8 12.5 8.7 8.0 7.8 Location al oz/ft = 0.30 kg/m bl Ib = 0.45 kg Copyright by ASTM Int'l (all rights reserved); Fri Jan 23:27:50 EST 2016 Downloaded/printed by University of Washington (University of Washington) pursuant to License Agreement No further reproductions authorized 47 ATMOSPHERIC CORROSION INVESTIGATION TABLE 17 Breaking loads of wires removed during the 20-year period 196l to 1981 Code No gage zinc-coated steel wire 99 oz/fl 2,a original breaking load 1058 lb b R, % Breaking Load Exposed, lb Loss, % % per Year Since IR Years Exposed Years to IR Years Since IR Kure Beach, 800 ft lot 16.0 17.1 18.2 19.2 20.2 9.1 9.1 9.1 9.1 9.1 6.9 8.0 9.1 10.1 11.1 20 40 65 65 65 1010 1046 1063 1029 1049 4.5 1.1 0.5 2.7 0.9 0.7 0.1 0.05 0.3 0.1 Newark 7.9 9.8 11.9 13.8 15.8 19.1 20.0 5.9 5.9 5.9 5.9 5.9 5.9 5.9 2.0 3.9 6.0 7.9 9.9 13.2 14.2 100 100 100 100 100 100 100 962 960 923 920 903 911 895 9.1 9.3 12.8 13.0 14.7 13.9 15.4 4.6 2.4 2.1 1.6 1.5 1.0 1.1 State College 15.8 19.1 20.0 _._ 17.0 17.0 2.1 3.0 75 85 1062 1085 1038 0.4 2.5 1.9 l.S 0.6 Warrington 9.4 10.9 11.6 12.4 12.6 13.2 13.2 4.7 4.7 4.7 4.7 4.7 4.7 4.7 4.7 6.2 6.9 7.7 7.9 8.5 8.5 100 100 100 100 100 100 100 749 694 653 622 640 586 617 29.2 34.4 38.3 41.2 39.5 44.6 41.7 6.2 5.5 5.6 5.4 5.0 5.2 4.9 Location al oz/ft 0.30 k g / m bl lb = 0.4,5 kg Copyright by ASTM Int'l (all rights reserved); Fri Jan 23:27:50 EST 2016 Downloaded/printed by University of Washington (University of Washington) pursuant to License Agreement No further reproductions a 48 ATMOSPHERICCORROSION INVESTIGATION T A B L E 18 Breaking loads of wires removed during the 20-year period 1961 to 1981 Code No gage zinc-coated steel wire 84 oz/ft 2, a original breaking load 1030 lb b R, % Breaking Load Exposed, Ib % per Year Since IR 0 1024 1036 0.6 0.6 95 95 1026 980 085 0.4 4.9 4.4 1.5 1.0 Years Exposed Years to I R Years Since IR Kure Beach, 800 ft lot 16.0 17.1 0 Newark 15.8 19.1 20.0 15.8 15.8 15.8 15.8 19.1 20.0 0 0 0 1016 1057 1038 1.4 2.6 0.8 13.2 13.2 13.2 13.2 0 1 987 1016 4.2 1.4 Location State College Warrington 3.3 4.2 Loss, % a o z / f t = 0.30 k g / m b l lb = 0.45 kg T A B L E 19 Breaking loads of wires removed during the 20-year period 1961 to 1981 Code No gage aluminum-coated steel wire 0.52 oz/ft 2, u original breaking load 1040 lb b Location Kure Beach, 800 ft lot Newark State College Warrington Years Exposed Years to I R Years Since IR R, % Breaking Load Exposed, Ib Loss, % % per Year Since IR 0 17.1 0 1011 1050 2.8 1.0 15.8 19.1 20.0 0 0 1048 1054 0.8 0 1038 15.8 19.1 9.8 9.8 20.0 9.8 6.0 9.3 10.2 2 1040 1063 1043 2.2 0.3 0.2 0.03 13.2 13.2 7.8 7.8 5.4 5.4 15 15 995 1054 4.3 1.3 0.8 0.2 16.0 0.2 a l o z / f t = 0.30 k g / m b l lb = 0.45 kg Copyright by ASTM Int'l (all rights reserved); Fri Jan 23:27:50 EST 2016 Downloaded/printed by University of Washington (University of Washington) pursuant to License Agreement No further reproductions au ATMOSPHERIC CORROSION INVESTIGATION 49 T A B L E 20 Breaking loads of wires removed during the 20-year period 1961 to 1981 Code No gage aluminum-coated steel wire 0.54 oz/ft2, a original breaking load 2885 lb b R, % Breaking Load Exposed, lb % per Year Since IR Years Exposed Years to I R Years Since IR Kure Beach, 0 ft lot 16.0 17.1 0 0 2836 2940 1.7 1.9 Newark 15.8 19.1 20.0 0 0 0 2940 2909 2896 - - 1.9 0.8 0.4 S t a t e College 15.8 19.1 20.0 8.9 8.9 8.9 6.9 10.2 11.9 5 2860 2927 2879 0.8 1.5 0.2 0.1 0.1 0.02 Warrington 13.2 13.2 10.9 10.9 2.3 2.3 5 2795 2905 3.1 0.7 1.3 0.3 Location Loss, % a l o z / f t = k g / m b l lb = k g T A B L E 21 Breaking loads of wires removed during the 20-year period 1961 to 1981 Code No gage aluminum-coated steel wire 2.44 oz/ft2, a original breaking load 3077 lb b R, % Breaking Load Exposed, Ib % per Year Since IR Years Exposed Years to I R Years Since IR Kure Beach, 0 ft lot 16.0 17.1 0 0 3091 3106 0.4 0.9 Newark 15.8 19.1 20.0 0 0 0 3181 3149 3115 3.4 2.4 1.2 S t a t e College 15.8 19.1 20.0 0 0 0 3056 3156 3093 0.7 2.6 0.5 Warrington 13.2 13.2 0 0 2987 3130 2.9 1.7 Location Loss, % '0"- a l o z / f t = k g / m b l lb = k g Copyright by ASTM Int'l (all rights reserved); Fri Jan 23:27:50 EST 2016 Downloaded/printed by University of Washington (University of Washington) pursuant to License Agreement No further reproductio 50 ATMOSPHERICCORROSION INVESTIGATION T A B L E 22 Breaking loads of wires removed during the 20-year period 196l to 1981 Code No 9 gage aluminum-coated steel wire 48 oz/ft 2, = original breaking load 1617 lb b R, % Breaking Load Exposed, lb Loss, % % per Year Since IR Years Exposed Years to I R Years Since IR Kure Beach, 800 ft lot 16.0 17.1 18.2 , 0 0 0 1388 1465 1463 14.2 9.4 9.5 Newark 15.8 19.1 20.0 0 0 0 1460 1395 1459 9.7 13.7 9.8 S t a t e College 15.8 19.1 20.0 0 0 0 1291 1504 1510 20.2 7.0 6.6 Warrington 13.2 13.2 8.5 8.5 4.7 4.7 10 10 1447 1531 10.5 5.3 2,2 1.1 Location =1 o z / f t = k g / m b l Ib kg T A B L E 23 Breaking loads of wires removed during the 20-year period 1961 to 1981 Code No 10 gage aluminum-coated steel wire 0.51 oz/ft ,a original breaking load 1488 lb b R, % Breaking Load Exposed, Ih % per Year Since IR Years Exposed Years to I R Years Since IR Kure Beach, 800 ft lot 16.0 17.1 0 0 1440 1450 0.1 0.8 Newark 15.8 19.1 20.0 0 0 0 1491 1428 1459 3.7 0.7 - 1.5 State College 15.8 19.1 20.0 8.9 8.9 8.9 6.8 10.2 11.1 10 8 I376 1445 1510 4,3 0.5 5.0 0.6 0.1 0.4 Warrington 13.2 13.2 7.8 7.8 5.4 5.4 10 10 1360 1473 5.4 2.4 1.0 0.4 Location =1 o z / f t = k g / m b l lb = 0.45 k g Loss, % 51 ATMOSPHERIC CORROSION INVESTIGATION TABLE 24 Breaking loads of wires removed during the 20-year period 1961 to 1981 Code No 11 gage aluminum-coated steel wire 0.27 oz/ft2, a original breaking load 1488 lb b R, %c Breaking Load Exposed, lb % per Year Since IR Years Exposed Years to IR Years Since IR Kure Beach, 800ft lot 16.0 17.1 20.2 10.0 10.0 10.0 6.0 7.1 10.2 tr R 1403 1468 1505 5.7 1.7 1.1 Newark 15.8 19.1 20.0 8.9 8.9 8.9 6.9 10.2 11.1 PPR 20 PHR 20 PHR 1483 1474 1447 0.3 0.9 2.8 0.04 0.09 0.25 State College 15.8 19.1 20.0 8.9 8.9 8.9 6.9 10.2 11.1 25 PHR 20 PHR 22 PHR 1445 1524 1485 2.9 -2.4 0.2 0.4 -0.2 0.02 Warrington 9.4 10.9 11.6 12.4 12.6 13.2 13.2 4.7 4.7 4.7 4.7 4.7 4.7 4.7 4.7 6.2 6.9 7.7 6.9 8.5 8.5 100 100 100 100 100 100 100 1356 1242 1220 1161 1148 1065 1105 9.5 16.5 18.0 22.0 22.8 28.4 25.7 Location Loss, % 1.0 0.2 0.1 2.0 2.7 2.6 2.9 2.9 3.3 3.0 =1 oz/ft = 0.30 k g / m bl Ib = 0.45 kg c See Table 11 for symbol definitions TABLE 25 Breaking loads of wires removed during the 20-year period 1961 to 1981 Code No 12 gage aluminum-coated steel wire O.48 oz/ft 2,a original breaking load 1407 lb b Years Since IR R, %c Breaking Load Exposed, lb 0 PPR 1350 1310 1427 1347 4.1 6.9 1.4 4.3 0 1395 1350 1360 0.9 3.1 3.3 Years Exposed Years to IR 16.0 17.1 19.2 20.2 20.2 0 0 Newark 15.8 19.1 20.0 0 State College 20.0 19.1 20.0 11.0 11.0 11.0 4.8 8.1 9.1 PHR PPR 1358 1385 1383 3.5 1.6 1.7 0.7 0.2 0.2 Warrington 13.2 13.2 9.4 9.4 3.8 3.8 5 1350 1373 4.1 2.4 1.1 0.6 Location Kure Beach, 800 ft lot a oz/ft = 0.30 k g / m bl ib = 0.45 kg c See Table 11 for symbol definitions Loss, % % per Year Since IR 52 ATMOSPHERIC CORROSION INVESTIGATION TABLE 26 Breaking loads of wires removed during the 20-year period 1961 to 1981 Code No 13 gage aluminum-coated steel wire 0.63 oz/ft2 f original breaking load 1423 lb b R, % Breaking Load Exposed, lb Loss, % Years Exposed Years to IR Years Since IR Kure Beach, 800 ft lot 16.0 17.1 0 0 1373 1409 3.5 1.0 Newark 15.8 19.1 20.0 0 0 0 1413 1417 1417 0.7 0.4 0.4 State College 15.8 19.1 20.0 0 0 0 1380 1439 1405 3.0 -1.I 1.3 Warrington 13.2 13.2 0 0 1343 1395 5.6 2.0 Location % per Year Since IR al oz/ft = 0.30 k g / m bl Ib = 0.45 kg TABLE 27 Breaking loads of wires removed during the 20-year period 1961 to 1981 Code No 17 12t/2 gage aluminum-coated steel wire O.29 oz/ft 2,a original breaking load 487 lb b Location Years Exposed % per Year Since IR Years to IR Years Since IR R, %c Breaking Load Exposed, lb 6.0 7.1 9.2 10.2 PPR PPR 485 481 511 482 0.4 1.2 -4.9 1.0 0.1 0.2 0.5 0.1 Loss, % Kure Beach, 800 ft lot 16.0 17.1 19.2 20.2 10 10 10 10 Newark 15.8 19.1 20.0 19.1 19.1 0 0.9 PPR 15 PPR 479 511 497 1.6 -4.9 -2.1 -213 State College 15.8 19.1 20.0 8.9 8.9 8.9 6.9 10.2 11.1 45 PHR 10 PPR 10 PPR 496 488 484 1.8 0.2 0.6 0.3 0.02 0.05 Warrington 9.4 10.0 11.6 12.4 12.6 13.2 13.2 4.7 4.7 4.7 4.7 4.7 4.7 4.7 4.7 6.2 6.9 7.7 7.9 8.5 8.5 100 100 100 100 100 100 100 402 229 308 254 375 274 271 17.5 53.0 36.8 47.8 23.0 43.7 44.4 3.7 8.5 5.3 6.2 2.9 S.1 5.2 ~1 oz/ft = 0.30 k g / m bl Ib = 0.45 kg cSr162 Table 11 for symbol definitions 53 ATMOSPHERIC CORROSION INVESTIGATION TABLE 28 Breaking loads of wires removed during the 20-year period 1961 to 1981 Code No 18 121/2 gage aluminum-coated steel wire 43 oz/ft 2, a original breaking load 490 lb b R, %c Breaking Load Exposed, Ib % per Year Since 1R Years Exposed Years to IR Years Since IR Kure Beach, 800 ft lot 16.0 17.1 0 0 477 485 2.7 1.0 Newark 15.8 19.1 20.0 0 0 507 510 3.5 4.1 0 498 1.6 State College 15.8 19.1 20.0 9.8 9.8 9.8 6.0 9.3 10.2 S 7 PPR 488 515 509 0.4 5.1 3.9 0.1 0.5 0.4 Warrington 13.2 13.2 5.8 5.8 7.4 7.4 40 40 455 484 7.1 1.2 1.0 0.2 Location Loss, % al oz/ft = 0.30 k g / m b l Ib = 0.45 kg cSee Table 11 for symbol definitions TABLE 29 Breaking loads of wires removed during the 20-year period 196l to 1981 Code No 20 121/~ gage aluminum-coated steel wire 0.37 oz/ft 2,a original breaking load 565 lb b R, %c Breaking Load Exposed, Ib % per Year Since IR 15 15 20 25 587 571 586 568 3.9 1.1 3.7 0.5 0.6 0.1 0.4 567 589 566 0.4 4.2 0.2 0.2 Years Exposed Years to IR Years Since 1R Kure Beach, 800 ft lot 16.0 17.1 19.2 20.2 9.1 9.1 9.1 9.1 6.9 8.0 10.2 11.1 Newark 15.8 19.1 20.0 - 19.1 19.1 019 PPR PPR State College 15.8 19.1 20.0 8.9 8.9 8.9 6.9 10.2 11.1 10 10 PPR 10 PPR 546 606 586 3.4 7.3 3.7 0.5 0.7 0.3 Warrington 13.2 13.2 5.8 5.8 7.4 7.4 75 75 509 528 9.9 6.5 1.3 0.9 Location al OZ/ft = 0.30 k g / m bl Ib = 0.45 kg cSee Table 11 for symbol definitions Loss, % 54 ATMOSPHERICCORROSION INVESTIGATION TABLE 30 Breaking loads of wires removed during the 20-year period 1961 to 1981 Code No 21 121/2 gage aluminum-coated steel wire O.37 oz/ft 2, a original breaking load 768 lb b Location Years Exposed Years to IR Years Since IR R, % Breaking Load Exposed, Ib Loss, % Kure Beach, 800 ft lot 16.0 17.1 18.2 0 0 0 757 548 784 1.4 28.7 2.1 Newark 15.8 19.1 20.0 0 0 0 787 796 764 2.5 3.6 0.5 State College 15.8 19.1 20.0 0 0 0 750 798 791 2.3 3.9 3.0 Warrington 13.2 13.2 0 0 729 788 5.1 2.6 % per Year Since IR al oz/ft = 0.30 k g / m bl Ib = 0.45 kg TABLE 31 Breaking loads of wires removed during the 20-year period 1961 to 1981 Code No 22 121/2 gage aluminum-coated steel wire 3.36 oz/ft2, a original breaking load 1012 lb b R, % Breaking Load Exposed, Ib Years Exposed Years to IR Years Since IR Kure Beach, 800 ft lot 16.6 17.4 0 0 1009 1084 0.3 7.1 Newark 15.8 19.1 20.0 0 0 0 1047 1055 1041 3.5 4.2 2.9 State College 15.8 19.1 20.0 0 0 0 1005 1053 1040 0.7 4.1 2.8 Warrington 13.2 13.2 0 0 950 1035 6.1 2.3 Location al oz/ft : 0.30 k g / m bl ib = 0.45 kg Loss, % % per Year Since IR ATMOSPHERIC CORROSION INVESTIGATION 55 Summary This atmospheric exposure investigation of aluminum-coated and zinccoated wire and wire products was conducted by ASTM Committee A-5 on Metallic-Coated Iron and Steel Products The data for the 20-year exposure in the U.S and 13-year exposure in England were the basis for this report From the visual observations and the tension tests on unfabricated and fabricated wire and wire products the following information has been obtained: The average corrosion rates to initial rusting (CIR) for aluminumcoated products, Table 12, and zinc-coated products, Table 13, were different for different locations Based on the all products average initial rusting rate on the aluminumcoated products, Table 12, the Warrington, England, site has the highest corrosion rate and Manhattan, Kansas, the lowest With the zinc-coated products, the all products average initial rusting rate, Table 13, is highest at Kure Beach (80 ft), North Carolina, and lowest at Manhattan, Kansas The statistical analysis of the tensile data showed a linear relationship between the percent loss of breaking load and years of exposure The loss of breaking load increased as the years of exposure increased The rate of loss of breaking load per year for uncoated and zinc-coated wire were different for different locations The maximum difference for bare wire was a ratio of 4:1 for Warrington and Newark, New Jersey The maximum difference for zinc-coated wire was a ratio of 4.2:1 for Warrington and State College, Pennsylvania The rate of loss of breaking load per year for zinc-coated wire decreased with increase in coating weight The rate of loss of breaking load per year for aluminum-coated wire decreased with increase in wire diameter The copper-containing steel wire is more resistant to corrosion than the copper-free steel wire ISBN 0-8031-0205-4