MIL-PRF-16173E INT AMD 1

Abstract

This specification covers solvent-dispersed corrosion preventive compounds that deposit thin, easily removable films after evaporation of solvent.<b><u>Intended Use:</u></b> The corrosion preventive compound covered by this specification is intended for the following uses:Grade 1: Hard film.(a) For protection of metals when exposed for extended periods to outdoor weather conditions.(b) For general purpose preservation, indoor or outdoor, with or without cover, for domestic and overseas shipment where a dry-totouch film is required.Grade 2: Soft film.(a) For extended indoor protection of interior or exterior surfaces of machinery, instruments, bearings or materials with or without use of supplementary barrier materials.(b) For outdoor protection of material for limited periods where metal temperatures do not reach levels that produce prohibitive flow of the corrosion preventive film.Grade 3: Soft film - water displacing.(a) For use where water or saline solution must be displaced from corrodible surfaces and the corrosion prevented or arrested.(b) For protection of metallic surfaces of machinery interior instruments, or parts under cover for limited periods.(c) For the protection of critical bare steel or phosphated surfaces for extended periods when packaged with suitable barrier materials.Note: Use grade 5 on metal(s) which may be attacked by an alkaline treatment during the preservative removal stage. The chemical "bell-out" is alkaline and its use should be avoided with such materials as aluminum and magnesium alloys.Grade 4: Soft film - water displacing.(a) For general purpose indoor and limited outdoor preservation of corrodible metals with or without an overwrap and where handling, stacking and counting requires a tack-free coating.(b) For storage protection of precision parts, machine tools, pistons, valves, and where a transparent coating is required in addition to properties indicated in item (a) above.(c) For protection of machinery and parts designated for export and where salt spray contamination is likely to occur.(d) Where there is not requirement for miscibility with lubricating oil and where ease of removal with stoddard&apos;s solvent (P-D-680) is important.Grade 5: Oily film - low pressure steam removable.(a) For use in place of grade 3 corrosion preventive compound where chemical boil-out cannot be used for removal (see grade 3).<br>