MIL-STD-1503 Preparation Of Aluminum Alloys For Surface Treatment And Inorganic CoatingThis standard describes the cleaning, activation and under-plating process, and material required for aluminum and aluminum alloys prior to applying inorganic coatings. It is intended that this standard be used in conjunction with other process documents, where the technical requirements are for the application of surface treatments and inorganic coatings on aluminum and aluminum alloys.

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MIL-STD-1503C

f. Bake Oven. A bake oven, if required, shall be located near the finishing line. The size of the oven shall be adequate to enclose the part to be finished. The oven shall be equipped with temperature indicating and regulating devices.

4.2 Racking. Sufficient contact area and pressure shall be provided to carry the current without overheating. Racking should be performed at the most convenient step prior to plating.

4.3. Masking. Sections or areas of the part that are not to be finished will be masked off. Plug and masking materials, which do not contaminate the finishing bath shall be used. Masking should be performed at the most convenient step prior to finishing.

4.4 Handling of Parts. After the parts have been cleaned, they will be handled in such a manner; white gloves, etc, that will ensure a minimum of contamination.

4.5 Finish. The finish of the part shall be controlled by the application specification.

4.6 Re-processing. Parts rejected for defective finish and require stripping and re-coating, shall include all the steps of this specification. Parts shall be stripped in accordance with MIL-STD-871.

5. DETAILED REQUIREMENTS

5.1 Surface Cleaning.

5.1.1 Alkaline Cleaners. Alkaline clean in one of the following solutions or equivalent.

5.1.1.1 Alkaline Cleaner Number 1:

5.1.1.2