Volume 05 - Surface Engineering Part 8 pptx

• • • • • • • • • [...]... • Exposed Matte Surfaces Cleaning and Surface Preparation General Surface Conditions After Galvanizing Table 8 Guide for visual inspection of galvanized surfaces Condition Causes Grounds for rejection? Choice of Paint Table 9 Comparative characteristics of paints and paint films used on hot dip galvanized steel Paint characteristics (film) Numbers of paints in Table 5 1 2 3 4 5 6 7 8 9 10 11 12 13... Content, wt% Table 5 Centrifugal casting speeds for tin-base babbitt bearings Inside diameter of bearing shell mm in Centrifugal casting speed, rev/min • • • • • μ iron phosphate coatings Component Composition, % Table 1 Effect of accelerators on the weight of an iron phosphate coating Accelerator Surface treated Coating weight g/m2 oz/ft2 × 1 0-3 Plat Surf Finish., Table 2 Accelerators used in phosphate... Table 2 Compositions and physical properties of lead-base babbitts ASTM B 23 alloy No Specific gravity Compressive yield point(a)(b) Cu Sn Sb Pb As (max) Metals Handbook Ultimate strength(a)(c) At 19 °C (66 °F) Composition, % At 100 °C (212 °F) At 19 °C (66 °F) At 100 °C (212 °F) MPa MPa MPa MPa ksi ksi ksi compressive ksi Hardness, HB(d) At 20 °C ( 68 °F) Melting point Complete liquefaction Proper pouring... Use in Design, Table 1 Compositions and physical properties of tin-base babbitts ASTM B 23 alloy No Specific gravity Compressive yield point(a)(b) Cu Sn Sb Pb Ultimate strength(a)(c) At 19 °C (66 °F) Composition, % At 100 °C (212 °F) At 19 °C (66 °F) At 100 °C (212 °F) MPa MPa MPa MPa ksi ksi ksi compressive ksi Hardness, HB(d) At 20 °C ( 68 °F) Melting point Complete liquefaction Proper pouring temperature... °F) MPa MPa MPa MPa ksi ksi ksi compressive ksi Hardness, HB(d) At 20 °C ( 68 °F) Melting point Complete liquefaction Proper pouring temperature °C °C °C At 100 °C (212 °F) °F °F °F white metals • • • Surface Cleaning, Finishing, and Coating Metals Handbook, Manual of Bearing Failures and Repair in Power Plant Rotating Equipment, Degreasing Pickling of steel, Abrasive blast cleaning • • • Table 3 Compositions... Finish., Table 2 Accelerators used in phosphate coating processes Type of accelerator Accelerator source Effective concentration Optimum operating conditions Ratio % NO − NO − g/L Temperature lb/gal × 1 0-3 °C NO − PO − °F Addition Advantages Limitations ClO − Prod Finish., . Exposed Matte Surfaces. Cleaning and Surface Preparation. General Surface Conditions After Galvanizing. Table 8 Guide for visual inspection of galvanized surfaces Condition Causes Grounds for. • • High-Temperature Galvanizing. d V d V • • • • Nickel Addition to the Bath.