Acquisition requirements. Acquisition documents should specify the following:
- Title, number, and date of the specification.
- Type and class required.
- Method of application, if restricted.
- If touch-up is permitted for mechanically damaged areas.
- Colorless coatings, if required.
- If touch-up is permitted for contact marks.
- Omit the paint adhesion test, if permitted.
- If electrical resistance testing is required for class 3 coatings.
- When electrical resistance testing is required, specify the required resistance values, frequency of testing, and test method.
- Alloy and temper of the process control test specimens
- Paint finish system for treated parts, if applicable.
- Quantity required.
- Sampling plan.
- Lot size.
Type I – Compositions containing hexavalent chromium.
Type II – Compositions containing no hexavalent chromium. (RoHS Compliant)
Note – If no material type is specified, type I will be used.
Class 1A – For maximum protection against corrosion on unpainted items, and increased adhesion on painted items.
Used on tanks, tubing, and component structures where only exterior protection is required.
Class 3 – For protection against corrosion where low electrical resistance is required.