GB/T 5267.4-2009Passivation of corrosion-resistant stainless-steel fasteners (English PDF)

Foreword

This Part is one of the series of national standards "Fastener surface treatment".

The series includes:

a) GB/T 5267.1-2002, Fasteners - Electroplated Coatings;

b) GB/T 5267.2-2002, Fasteners - Non-electrolytically applied zinc flake

coatings;

c) GB/T 5267.3-2002, Fasteners - Hot dip galvanized coatings;

d) GB/T 5267.4-2002, Passivation of corrosion-resistant stainless-steel

fasteners.

This Part is Part 4 of GB/T 5267.

This Part identically adopts the international standard ISO 16048:2003

"Passivation of corrosion-resistant stainless-steel fasteners" (English version).

In the normative references, use Chinese standards to replace international

standards (Chapter 2).

Annex A of this Part is informative.

This Part was proposed by China Machinery Industry Federation.

This Part shall be under the jurisdiction of National Technical Committee on

Fasteners of Standardization Administration of China (SAC/TC 85).

Main drafting organizations of this Part: China Machinery Productivity

Promotion Center.

This Part is explained by the Secretariat of National Technical Committee on

Fasteners of Standardization Administration of China.

Passivation of corrosion-resistant stainless-steel

fasteners

1 Scope

This Part of GB/T 5267 specifies the methods most often used for passivation

of corrosion-resistant stainless-steel fasteners.

Typical anodic dissolution behaviour of an active-passive-transpassive metal is

given in Annex A.

2 Normative references

The provisions in following documents become the provisions of this Standard

through reference in this Part of GB/T 5267. For dated references, the

subsequent amendments (excluding corrigendum) or revisions do not apply to

this Standard, however, parties who reach an agreement based on this

Standard are encouraged to study if the latest versions of these documents are

applicable. For undated references, the latest edition of the referenced

document applies.

GB/T 3098.6, Mechanical Properties of fasteners- Stainless steel bolts,

screws and studs (GB/T 3098.6-2000, idt ISO 3506-1:1997)

GB/T 3098.15, Mechanical properties of fasteners-Nuts made of stainless-

steel (GB/T 3098.15-2000, idt ISO 3506-2:1997)

GB/T 3098.16, Mechanical properties of fasteners - Stainless steel set

screws (GB/T 3098.16-2000, idt ISO 3506-3:1997)

GB/T 3098.21, Mechanical properties of fasteners - Stainless steel tapping

screws (GB/T 3098.21-2008, ISO 3506-4:2003, Mechanical procedure

corrosion-resistant stainless-steel fasteners - Part 4: Tapping screws, IDT)

3 Terms and definitions

For the purposes of this document, the following terms and definitions apply.