Cz Chrome et zinc Processes Chrome et zinc
| TREATMENT | APPLIED ON | PURPOSE | SPECIFICATION |
|---|---|---|---|
| Chrome |
Aluminum and its alloys | Decorative chrome | |
| Zinc | Coatings of zinc and its alloys | Strong resistance to corrosion and a paint primer. Normally yellow or clear, if required | ASTM B633-15 |
| Electrolytic copper plating | Copper alloys (brass, beryllium alloy, alloy 725) | Undercoating to eliminate zinc migration in tin, lead-tin and silver deposits. | ASTM B456-15 ASTM B734-15 |
| Chemical passivation | Stainless steel | Chemically dissolves surface iron particles to reduce corrosion. | QQ-P-35 Type VI; NT662 |
| Electrolytic tin plating | Non-ferrous or ferrous metals | Improves solderability and conductivity; the glossy coating is less porous. | MIL-T-10727 Type I (electrolytic); ASTM B545-92; Class A to E (0.0001 to 0.0012 in.); NT560 |
| Electrolytic lead-tin plating (lead-tin) | Non-ferrous or ferrous metals | Improves solderability and conductivity; the 2% lead eliminates whisker growth. | NT786 glossy or matte coating; 88-98% tin and 2-12% lead, minimum of 0.0002 in. |
| Electrolytic zinc plating | Iron metals | Strong resistance to corrosion and a paint primer. Type I (no chrome) Type II (yellow, olive-green and black chrome) Type III (light chrome) | ASTM B633 Class SC1 (thin) to Class SC4 (thick); NT289A |