Каталог стандартов
+7 (495) 223-46-76
+7 (812) 309-78-59
inform@normdocs.ru
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.