ASTM F1136/F1136M specification covers the basic requirements for water-based zinc/aluminum dispersion inorganic basecoats and optional sealers and topcoats for fasteners. The basecoat can contain chrome (C) or be non-chrome (NC).
These coatings are applied by conventional dip-spin, dip-drain, or spray methods to ferrous parts which can be handled through a cleaning, coating, and baking operation, and which are not adversely affected by baking temperatures up to 330°C [626°F].
ASTM F1136/F1136M Coating process does not induce the possibility of internal hydrogen embrittlement providing that the fasteners have not been cleaned or pre-treated with an acid or phosphate.Alkaline cleaning or vapor degreasing is required along with shot blasting to remove rust or scale. The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.
ASTM F1136/F1136M standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of ASTM F1136/F1136M standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.