MIL-STD-186F (MI)
The submission of these samples is for validation of the paint or surfaces for spectral and gloss characteristics. With this information, the inspector will have the means, along with the painting procedures, to accept or fail an end product.
5.6 Applications inspection.
5.6.1 General. Inspectors shall conduct frequent and regular checks to ensure compliance with the requirements of this standard. The items specifically detailed below shall receive the most scrupulous attention by inspectors and quality control personnel.
5.6.2 Cleanliness. Inspectors shall conduct tests just prior to application of paint-type coatings to assure that the surface is thoroughly clean and free from contaminants. The water break test described in 5.5.3.2.2 and the litmus paper test described in 5.5.3.2.1 shall be applied to questionable surfaces to assure that adequate cleaning and rinsing procedures have been employed and to check for freedom from residual steam-cleaning compound and other cleaning material residues. If representative test areas fail these tests, the parts shall be returned to the cleaning process and recleaning accomplished.
5.6.3 Hiding power, gloss, and smoothness. Inspectors shall conduct regular and frequent inspection tests to insure smoothness of the finish system. Regardless of whether the finish is high gloss or low gloss, specks and bumps detected visually or by drawing the fingertips across the shaded or rubbed finish in various directions shall be removed. There shall be no seediness or roughness caused by dried overspray, improper thinning, or improper gun adjustment. The painted surfaces (when dry) shall be checked visually for hiding power and gloss by comparison with an approved sample. Comparison samples can be made up by the applicator and approved by the procuring activity or obtained from the Army Research Laboratory, Weapons and Materials Research Directorate, ATTN: AMSRL-WM, Aberdeen Proving Ground, MD 21005.
5.6.4 Adhesion. Inspectors shall conduct regular and frequent wet tape adhesion tests on the exterior finish after drying for a period of not less than 48 hours for a lacquer system and 72 hours for an enamel system. The test will be
conducted on a sufficient number of samples to ensure maintenance of a satisfactory level of adhesion on full production. In performing this test, it is suggested that a piece of cloth or plastic be taped on the area under inspection. The test area shall
be kept soaked not less than 24 hours with tap or distilled water. The test areas shall have a diameter of not less than 3 inches. Remove the wet cloth and blot up the surface water. Immediately thereafter, apply a 1-inch strip of tape, A-A-883 (only newly manufactured tape shall be used), adhesive down. Press the tape down,
using two passes of a 2.5 pound rubber covered roller or apply firm pressure with the thumb. In general the tape shall not be applied over rivets, skin laps, holes, slots, or screw heads. Repeated application of the tape on one area is not necessary.
41
For Parts Inquires call Parts Hangar, Inc (727) 493-0744
© Copyright 2015 Integrated Publishing, Inc.
A Service Disabled Veteran Owned Small Business