1.1本规范涵盖了螺纹紧固件用三级铬/锌无机涂层的基本要求。 1.2这些涂层采用传统的浸渍-旋转或浸渍-排水方法。 1.3如果紧固件未经酸预处理，涂层过程不会引起氢脆。

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.