AS 1789-2003


Electroplated zinc (electrogalvanized) coatings on ferrous articles (batch process)

Specifies requirements for electroplated zinc coatings (or electrogalvanized coatings) on iron or steel articles by batch process.
Published: 11/09/2003
Pages: 27
Table of contents
Cited references
Content history
Table of contents
About this publication
1 Scope
2 Reference documents
3 Definitions
4 Basis metal
5 Coating system
5.1 Basic system
5.2 Supplementary system
6 Coating classification code
7 Heat treatment
8 Zinc whisker growth
9 Zinc coating requirements
9.1 Appearance of zinc coating
9.2 Thickness of zinc coating
9.3 Adhesion of zinc coating
10 Test methods for zinc coatings
10.1 Thickness
10.2 Adhesion
11 Chromate conversion coatings
11.1 General
11.2 Classification of chromate conversion coatings
12 Requirements and tests for chromate conversion coatings
12.1 General
12.2 Presence
12.3 Adhesion
12.4 Coating mass
12.5 Corrosion resistance
13 Conformance
14 Identification
Appendix A
Appendix B
B1 General
B2 Atmospheric corrosivity categories
B2.1 General
B2.2 Category A: Very low
B2.3 Category B: Low
B2.4 Category C: Medium
B2.5 Category D: High
B2.6 Category E: Very high (E-I: Industrial, E-M: Marine)
B2.7 Category F: Inland Tropical
B3 Macroclimatic effects
B4 Microclimatic and other effects
B5 Corrosion during transport and storage
Appendix C
Appendix D
D1 Scope
D2 Requirements
D3 Categorization of steels
D4 Heat treatment
D4.1 High strength steels
D4.2 Shorter times at higher temperatures
D4.3 Stress relief temperatures after shot peening
D4.4 Steels below 1400 MPa
Appendix E
E1 Scope
E2 Requirements
E3 Categorization of steels
E4 Heat treatment after processing
E4.1 General
E4.2 High strength steels
E4.3 Threads and sharp notches
E4 Surface-hardened, through-hardened, and bearing steels.
Appendix F
Appendix G
G1 Adhesion test for Type C and Type D chromate conversion coatings
G2 Spot test for the presence of a chromate conversion coating
G2.1 Reagents for spot test solution
G2.2 Method of preparation
G2.3 Test procedure
G3 Lead acetate test for the absence of a chromate converion coating
G3.1 Reagents for lead acetate test
G3.2 Method of preparation
G3.3 Test procedure
G4 Determination of the mass of chromate conversion coating
G4.1 Principle
G4.2 Test pieces
G4.3 Electrolysis reagent
G4.4 Procedure
G4.5 Calculation
Cited references in this standard
Guide to the protection of structural steel against atmospheric corrosion by use of protective coatings
Metallic and other inorganic coatings — Automated controlled shot-peening of metallic articles prior to nickel, autocatalytic nickel or chromium plating, or as a final finish
Corrosion of metals and alloys — Corrosivity of atmospheres — Classification, determination and estimation
Metallic coatings — Measurement of coating thickness — Profilometric method
Hot-dip galvanized (zinc) coatings on fabricated ferrous articles
Content history
AS 1789-2003 REC:2017
DR 03202
Inclusive of GST
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