MIL-STD-1504C
FEDERAL SPECIFICATIONS
TT-C-490 Chemical Conversion Coatings of Pre-treatments for Ferrous Surfaces (Base for Organic Coatings)
COMMERICAL ITEM DESCRIPTIONS
A-A-1722 Grain, Abrasive (Soft Blasting) A-A-59316 Abrasive Materials, Blasting for
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CODE OF FEDERAL REGULATIONS (CFR)
29 CFR 1910 Toxic and Hazardous Substances
(Copies of this document are available online at www.access.gpo.gov/nara/cfr or from the Superintendent of Documents, U.S. Printing Office, North Capitol & "H" Streets, N.W., Washington D.C. 20402-0002.)
2.3 Order of precedence. In the event of a conflict between the text of this document and the references cited herein, the text of this document takes precedence. Nothing in this document, however, supersedes applicable laws and regulations unless a specific exemption has been obtained.
3. DEFINITIONS (Not applicable)
4. GENERAL REQUIREMENTS
4.1 Abrasive blasting. Aircraft components will not be abrasive blasted unless specifically authorized by applicable drawings or their process specifications.
4.2 Cleaning. Parts to be abrasive blasted shall be free of grease and oil. Cleaning shall be in accordance with MIL-S-5002 or TT-C-490.
4.3 Surface defects. Significant surface defects are not to be removed by abrasive blasting. These defects should be removed as specified or authorized by the applicable engineering department.
4.4 Blasting method. When blasting, the discharge flow shall be as smooth and continuous as possible to prevent uneven erosion of surfaces. Caution shall be exercised to avoid excessive blasting of surfaces to avoid warpage and pitting of material. Blasting time shall be no longer than is necessary to clean the surface.
4.5 Corrosion. Blast cleaning exposes uncontaminated metal to the environment. Parts shall only be blasted immediately preceding the painting or plating
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