BS EN 12329:2000 – Corrosion protection of metals Ð Electrodeposited coatings of zinc with supplementary treatment on iron or steel
1 Scope
This European Standard specifies requirements for electrodeposited coatings of zinc on iron or steel with supplementary treatment. This European Standard does not specify chromate finishes which are required only for improving the adhesion of paints or varnishes.
NOTE This European Standard is not intended to be used alone, but is the complement of EN 1403. It is necessary for the purchaser to specify the zinc electrodeposited coating in accordance with the designation as specified in EN 1403.
2 Normative references
This European Standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies.
prEN ISO 3497, Metallic coatings — Measurement of coating thickness — X-ray spectrometric methods (ISO/DIS 3497:1998).
prEN ISO 3543, Metallic and non-metallic coatings — Measurement of thickness — Beta backscatter method (ISO/DIS 3548:1998).
EN 1403:1998, Corrosion protection of metals — Electrodeposited coatings — Method of specifying general requirements.
EN ISO 1461, Hot dip galvanized coatings on fabricated iron and steel articles — Specifications and test methods (ISO 1461:1999).
EN ISO 1463, Metallic and oxide coatings — Measurement of coating thickness — Microscopical method ISO 1463:1982).
EN ISO 2177, Metallic coatings — Measurement of coating thickness — Coulometric method by anodic dissolution (ISO 2177:1985).
EN ISO 2178, Non-magnetic coatings on magnetic substrates — Measurement of coating thickness — Magnetic method (ISO 2178:1982).
EN ISO 2360, Non-conductive coatings on non-magnetic basis metals — Measurement of coating thickness — Eddy current method (ISO 2360:1982).
EN ISO 2819, Metallic coatings on metallic substrates — Electrodeposited and chemically deposited coatings — Review of methods available for testing adhesion (ISO 2819:1980).
EN ISO 3613:1994, Chromate conversion coatings on zinc and cadmium — Test methods (ISO 3613:1980).
EN ISO 3892, Conversion coatings on metallic materials — Determination of coating mass per unit area — Gravimetric methods (ISO 3892:1980).
ISO 9227, Corrosion tests in artificial atmospheres — Salt spray tests.
3 Terms and definitions
For the purposes of this standard the terms and definitions given in EN 1403 apply.
4 Information to be supplied by the purchaser
The information to be supplied by the purchaser shall be as specified in EN 1403. In addition, the purchaser shall use the designation specified in clause 5.
5 Designation
5.1 General
The appropriate designation according to the severity of service conditions which the coating has to withstand (see annex B) shall be used.
NOTE Examples of designations are given in annex C.
5.2 Heat treatment
The heat treatment designation as described in EN 1403 shall be used (see clause 6).
5.3 Supplementary treatments
5.3.1 Chromate conversion coatings
The codes for chromate conversion coatings given in annex B shall be used.
NOTE See annex A for more information on chromate conversion coatings.
5.3.2 Other supplementary treatments
Treatments carried out after chromating to enhance corrosion resistance (sealants) or provide colour (dyes)
shall be specified in the designation using the symbols given in EN 1403.
NOTE See the introduction, A.2 and A.5 for more information on sealing and dyeing.
BS EN 12329:2000 – Corrosion protection of metals Ð Electrodeposited coatings of zinc with supplementary treatment on iron or steel