Volume 05 - Surface Engineering Part 14 pdf

Table 5 Conditions of belt polishing for bright finishing aluminum die-cast soleplates Operation Area polished Polishing head, No Type Belt(a) Contact wheel Size mm Hardness, durometer in Size mm Abrasive mesh size in Life, pieces Table 6 Equipment and operating conditions for high-luster buffing of aluminum products Product Size Type of buffing machine Type Buffing wheel Production, pieces per hour Diameter Thread count Overall mm in mm Center in mm in Type of compound Wheel speed Ply mm in m/s sfm Table 7 Sequence and conditions of automatic buffing operations for obtaining specular finish on aluminum frying-pan covers Operation Area buffed Buffing head No Application compound(a) Buffing wheel Type Diameter Overall mm in Ply Center mm Density No of sections Speed Life, pieces Arbor hole mm Thread count in No of guns in m/s of sfm Cycle,s On Off g per shot oz per shot or Copper strike plating μ Table 9 Minimum total plate thicknesses for decorative chromium plating Service environment Wrought alloys Cast alloys μm μm mils mils Zinc immersion deposits Chromium Copper Nickel Copper, nickel, tin, cadmium, and zinc Gold, silver, copper, and nickel Table 10 Organic finishing systems for magnesium alloys Appearance effect Typical finishing system for Interior service(a) Exterior service(b) μ μ μ Table 11 Military finishing systems for magnesium alloys Operation Appearance Applicable specifications • • • • Proc Int Magnesium Association A Bloyce, P.H Morton, and T Bell, University of Birmingham, U.K Materials Properties Handbook: Titanium Alloys, • • γ Surface Cleaning, Finishing, and Coating, Metals Handbook, Wear, Oxid Met., Cleaning and Descaling Problems • • • • • Ti-6Al-4V alpha case 250× • • • Removal of Scale Cleaning and belt grinding sequences for Ti-6Al-4V sheet • Wet blasting: • Dry blasting: Effect of surface condition on etched metal surface • • • • • Table 1 Low-temperature salt bath and acid bath conditions for cleaning titanium alloys Sample composition Scale formation temperature °C °F Salt bath immersion time(a), min Acid cleaning bath time(b), min Acid cleaning bath time(c), s Pickling Procedures following Descaling Table 2 Corrosion of titanium in sulfuric acid pickle baths Sulfuric acid concentration, % Acid addition Corrosion rate °C Removal of Tarnish Films Bath temperature μm/yr °F mils/yr ... Solution Amount or value Solution Solution Solution Constituent or condition Phosphoric-nitric(a) Phosphoric-acetic-nitric(c) Range Table 12 Electrolytic brightening and polishing solutions and processes... aluminum surfaces Constituent or condition Etching cleaners Amount or value Nonetching cleaners Constituents Solution A Solution B Composition, % Table 11 Acid cleaners used to clean aluminum surfaces... post-treatments Table 13 Fluoboric acid electrobrightening of aluminum and aluminum alloys Constituent or condition Electrobrightening(a) Smut removal Amount or value Anodizing Sealing Table 14