ASTM F1136-88(1998)e1 - 10.10.1998
 
1. Scope

1.1 This specification covers the basic requirements for three grades of chromium/zinc inorganic coatings for threaded fasteners.

1.2 These coatings are applied by conventional dip-spin or dip-drain methods.

1.3 The coating process does not induce hydrogen embrittlement providing that the fasteners have not been pretreated with an acid.

 
2. Referenced Documents

B117-26a

Standard Practice for Operating Salt Spray (Fog) Apparatus (Includes all amendments and changes 9/22/2026).

F1940-07a(2024)

Standard Test Method for Process Control Verification to Prevent Hydrogen Embrittlement in Plated or Coated Fasteners (Includes all amendments and changes 9/11/2024).

F1789-26

Standard Terminology for F16 Mechanical Fasteners

F1470-24

Standard Practice for Fastener Sampling for Specified Mechanical Properties and Performance Inspection

F1624-12(2024)

Standard Test Method for Measurement of Hydrogen Embrittlement Threshold in Steel by the Incremental Step Loading Technique

F606-14

Standard Test Methods for Determining the Mechanical Properties of Externally and Internally Threaded Fasteners, Washers, Direct Tension Indicators, and Rivets

D3359-23

Standard Test Methods for Rating Adhesion by Tape Test

D610-25

Standard Practice for Evaluating Degree of Rusting on Painted Steel Surfaces