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

NOTE: Optional low pH (10.2 - 10.5) bath solutions may also be used.

n. Step Number 14: Rinse thoroughly in clean water. The rinse water temperature should be ambient.

o. Step Number 15: Immediately immerse in the plating bath and plate per the application specification. Make electrical connections to the part outside the plating tank. Apply voltage so that the current will flow upon the immersion of parts.

NOTE: Some plating deposits such as silver and gold will require an immediate deposit of nickel between the plating strike and the plating deposit to prevent migration.

p. Inspection. Inspection shall be in accordance with the applicable plating specification and the requirements of the process standard.

5.4 Quality Control.

5.4.1 Quality Control Responsibility. The responsible quality control department shall enforce all requirements of this standard. Inspection to meet requirements shall be performed with such frequency as deemed necessary by the quality control department to assure compliance with the standard.

5.4.2 Process Controls. Solutions and equipment shall be checked periodically and maintained in accordance with the requirements of this process standard.

5.4.3 Adhesion. Parts can be tested for adhesion by plating them in boiling water for one hour. The parts shall show no blisters or separation of the undercoat from the base material at their common interface(s).

5.4.4. Castings. All sealed castings shall be pressure checked after plating. Parts which are found to leak shall be resealed.

5.4.5 Caution (or Warning). The procedures specified herein utilize materials listed in the Department of Labor (DOL) Occupational, Safety and Health Standards as "Toxic and Hazardous Substances." Personnel exposure to these materials must be limited to those values specified in Section 2.1.2 of CFR 1910.1000 (OSHA Standard).

6. NOTES

(This section contains information of a general or explanatory nature that may be helpful, but not mandatory.)

6.1 Intended use. This standard provides guidance on the process and procedure for preparation of aluminum alloys for surface treatment and inorganic coating during the Air Force repair process on the landing gear of all military aircraft. It is a standard that is used primarily by the Air Force at Hill Air Force Base.

6.2 Subject term (key word) listing.

Alkaline Equipment Materials