1 Scope
This standard specifies the terms and definitions, designation expression methods, classification and code, dimension, shape, weight, technical requirements, test methods, inspection rules, packaging, marking and quality certificates of continuously electrolytically zinc/zinc-nickel alloy coated steel sheet and strip.
This standard is applicable to electrolytically zinc/zinc-nickel alloy coated steel sheet and strip used in automobile, household appliances, electronics and other industries (hereinafter referred to as steel sheet and strip).
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 247 General rule of package mark and certification for steel sheets and strips
GB/T 708 Dimension, shape, weight and tolerance for cold-rolled steel strip and sheet
GB/T 1839-2008 Test method for gravimetric determination of the mass per unit area of galvanized coatings on steel products
GB/T 5213 Cold rolled low carbon steel sheet and strip
GB/T 8170 Rules of rounding off for numerical values & expression and judgment of limiting values
GB/T 10125 Corrosion tests in artificial atmospheres — Salt spray tests
GB/T 17505 Steel and steel products — General technical delivery requirements
GB/T 20564 (all parts) Continuously cold rolled high strength steel sheet and strip for automobile
GB/T 39130 Measuring method for adhesion of zinc coating for galvanized products
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
electrolytic zinc coating; ZE
coating composed of electrolytic zinc produced by an electroplating process in a continuous zinc electroplating production line, which excludes any trace elements harmful to the adhesive force or coating property
3.2
electrolytic zinc-nickel coating; ZN
coating composed of zinc-nickel alloy produced by an electroplating process in a continuous zinc electroplating production line, which contains about 8% ~ 15% of nickel and the rest is zinc
3.3
anti-fingerprint treatment
treatment for surface of steel sheet and strip which is passivated by electrolysis and coated with anti-fingerprint film to improve the stain resistance of electronic or electrical products.
Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 Designation expression methods, classifications and codes
5 Order contents
6 Dimension, shape and weight
7 Technical requirements
8 Test methods
9 Inspection rules
10 Packaging, marking and quality certificate
Annex A (Normative) Weight calculation method in theoretical weight calculation
