x
Contents
7.3.1 Surface Preparation and Application ................................ 207
7.3.2 Atmospheric Effects ............................................................ 207
7.3.3 Types of Failures .................................................................. 210
7.3.3.1 Strength of Paint Film .......................................... 210
7.3.3.2 Cohesive Failure ................................................... 212
7.3.3.3 Stress and Chemical Failures ............................. 213
7.4 Types of Corrosion under Organic Coatings ................................ 213
7.4.1 Wet Adhesion ....................................................................... 214
7.4.2 Osmosis ................................................................................. 215
7.4.3 Blistering ............................................................................... 215
7.4.4 Cathodic Delamination ....................................................... 216
7.4.5 Anodic Undermining .......................................................... 217
7.4.6 Filiform Corrosion ............................................................... 217
7.4.7 Early Rusting ........................................................................ 218
7.4.8 Flash Rusting ........................................................................ 218
7.5 Stages of Corrosion ........................................................................... 218
7.5.1 First Stages of Corrosion ..................................................... 218
7.5.2 Second Stage of Corrosion .................................................. 219
7.5.3 Third Stage of Corrosion ..................................................... 219
7.5.4 Fourth Stage of Corrosion ................................................... 219
7.5.5 Fifth Stage of Corrosion ...................................................... 219
7.5.6 Final Stage of Corrosion ...................................................... 220
7.6 Surface Preparation ........................................................................... 220
7.6.1 Metal Substrate Preparation ............................................... 220
7.6.1.1 Abrasive Cleaning ................................................222
7.6.1.2 Detergent Cleaning ..............................................222
7.6.1.3 Alkaline Cleaning ................................................223
7.6.1.4 Emulsion Cleaning ............................................... 223
7.6.1.5 Solvent Cleaning................................................... 223
7.6.1.6 Vapor Degreasing .................................................223
7.6.1.7 Steam Cleaning .....................................................223
7.6.2 Metal Surface Pretreatment ................................................223
7.6.2.1 Aluminum ............................................................. 224
7.6.2.2 Copper.................................................................... 224
7.6.2.3 Galvanized Steel ................................................... 224
7.6.2.4 Steel ........................................................................ 224
7.6.2.5 Stainless Steel ........................................................ 224
7.6.2.6 Titanium ................................................................ 224
7.6.2.7 Zinc and Cadmium ..............................................225
7.6.3 Plastic Substrate Preparation ..............................................225
7.6.3.1 Solvent Cleaning................................................... 226
7.6.3.2 Detergent Cleaning .............................................. 226
7.6.3.3 Mechanical Treatments ....................................... 227
7.6.3.4 Chemical Treatment ............................................. 227
7.6.3.5 Other Treatments.................................................. 229
Contents
7.3.1 Surface Preparation and Application ................................ 207
7.3.2 Atmospheric Effects ............................................................ 207
7.3.3 Types of Failures .................................................................. 210
7.3.3.1 Strength of Paint Film .......................................... 210
7.3.3.2 Cohesive Failure ................................................... 212
7.3.3.3 Stress and Chemical Failures ............................. 213
7.4 Types of Corrosion under Organic Coatings ................................ 213
7.4.1 Wet Adhesion ....................................................................... 214
7.4.2 Osmosis ................................................................................. 215
7.4.3 Blistering ............................................................................... 215
7.4.4 Cathodic Delamination ....................................................... 216
7.4.5 Anodic Undermining .......................................................... 217
7.4.6 Filiform Corrosion ............................................................... 217
7.4.7 Early Rusting ........................................................................ 218
7.4.8 Flash Rusting ........................................................................ 218
7.5 Stages of Corrosion ........................................................................... 218
7.5.1 First Stages of Corrosion ..................................................... 218
7.5.2 Second Stage of Corrosion .................................................. 219
7.5.3 Third Stage of Corrosion ..................................................... 219
7.5.4 Fourth Stage of Corrosion ................................................... 219
7.5.5 Fifth Stage of Corrosion ...................................................... 219
7.5.6 Final Stage of Corrosion ...................................................... 220
7.6 Surface Preparation ........................................................................... 220
7.6.1 Metal Substrate Preparation ............................................... 220
7.6.1.1 Abrasive Cleaning ................................................222
7.6.1.2 Detergent Cleaning ..............................................222
7.6.1.3 Alkaline Cleaning ................................................223
7.6.1.4 Emulsion Cleaning ............................................... 223
7.6.1.5 Solvent Cleaning................................................... 223
7.6.1.6 Vapor Degreasing .................................................223
7.6.1.7 Steam Cleaning .....................................................223
7.6.2 Metal Surface Pretreatment ................................................223
7.6.2.1 Aluminum ............................................................. 224
7.6.2.2 Copper.................................................................... 224
7.6.2.3 Galvanized Steel ................................................... 224
7.6.2.4 Steel ........................................................................ 224
7.6.2.5 Stainless Steel ........................................................ 224
7.6.2.6 Titanium ................................................................ 224
7.6.2.7 Zinc and Cadmium ..............................................225
7.6.3 Plastic Substrate Preparation ..............................................225
7.6.3.1 Solvent Cleaning................................................... 226
7.6.3.2 Detergent Cleaning .............................................. 226
7.6.3.3 Mechanical Treatments ....................................... 227
7.6.3.4 Chemical Treatment ............................................. 227
7.6.3.5 Other Treatments.................................................. 229