7.3.6 Lead Coatings.............................................................................. 431
7.3.7 Terneplate..................................................................................... 432
7.3.8 Gold Coatings.............................................................................. 432
7.3.9 Copper Coatings ......................................................................... 433
7.4 Nonnoble Coatings .................................................................................. 435
7.4.1 Zinc Coatings............................................................................... 440
7.4.1.1 HotDipping................................................................... 440
7.4.1.2 ZincElectroplating ....................................................... 441
7.4.1.3 Mechanical Coating ...................................................... 442
7.4.1.4 Sherardizing................................................................... 442
7.4.1.5 Thermally Sprayed Coatings ...................................... 442
7.4.1.6 ZincDustPainting........................................................ 443
7.4.1.7 Corrosion of Zinc Coatings ......................................... 443
7.5 Zinc–5% Aluminum Hot-Dip Coatings ............................................... 448
7.6 Zinc–55% Aluminum Hot-Dip Coatings ............................................. 448
7.7 Zinc–15% Aluminum Thermal Spray................................................... 451
7.8 Zinc–Iron Alloy Coatings ....................................................................... 451
7.9 Aluminum Coatings ................................................................................ 452
7.10 Cadmium Coatings ................................................................................. 452
7.11M anganese Coatings ............................................................................... 452
7.12 Conversion Coatings............................................................................... 453
7.12.1 Phosphate Coating.................................................................... 454
7.12.2 Chromate Coating..................................................................... 455
7.12.3 Oxide Coatings.......................................................................... 457
7.12.4 Anodized Coatings ................................................................... 457
7.13 Organic Coatings ..................................................................................... 459
7.13.1 Composition of Organic Coatings.......................................... 461
7.13.1.1 Resin Component..................................................... 461
7.13.1.2 Pigments..................................................................... 467
7.13.1.3 Fillers (Extenders)..................................................... 468
7.13.1.4 Additives.................................................................... 469
7.13.1.5 Solvents ...................................................................... 469
7.13.2 Surface Preparation .................................................................. 469
7.13.3 Application Methods................................................................ 471
7.13.3.1 Brushing ..................................................................... 472
7.13.3.2 Spray........................................................................... 472
7.13.3.3 Roller Coating ........................................................... 473
7.13.3.4 Powder Coating ........................................................ 473
7.13.3.5 Electrodeposition ...................................................... 473
7.13.3.6 MultilayerCoatings.................................................. 475
7.13.4 Factors Affecting Life of Film ................................................. 475
7.13.5 Strength of Paint Film .............................................................. 476
7.13.6 Adhesion of Paint Film ............................................................ 477
7.13.7 Types of Corrosion under Organic Coatings ....................... 479
7.13.7.1 Cathodic Delamination............................................ 480
7.13.7.2 Anodic Undermining............................................... 480
CAT8247—PRELIMS—10/11/2006—21:01—SRIDHAR—XML MODEL B–pp. 1–15