AS 1791-1986

1 - AS 1791-1986 CHROMATE CONVERSION COATINGS - ZINC AND CADMIUM
4 - PREFACE
4 - CONTENTS
5 - FOREWORD
6 - 1 SCOPE.
6 - 2 APPLICATION.
6 - 3 REFERENCED DOCUMENTS.
6 - 4 CLASSIFICATION OF CHROMATE CONVERSION COATINGS.
6 - 5 REQUIREMENTS FOR CHROMATE CONVERSION COATINGS.
6 - 5.1 General.
6 - 5.2 Presence.
6 - 5.3 Adhesion.
7 - 5.4 Coating mass.
7 - 5.5 Corrosion resistance.
8 - APPENDIX A - PURCHASING GUIDELINES
8 - A1 INFORMATION TO BE SUPPLIED WITH THE PURCHASE ORDER.
8 - A2 COLOUR OF CHROMATE CONVERSION COATINGS.
9 - APPENDIX B - TEST METHODS FOR CHROMATE CONVERSION COATINGS ON ZINC AND CADMIUM COATINGS
9 - B1 ADHESION TEST FOR TYPE C AND TYPE D CHROMATE CONVERSION COATINGS.
9 - B2 SPOT TEST FOR THE PRESENCE OF A CHROMATE CONVERSION COATING.
9 - B3 LEAD ACETATE TEST FOR THE ABSENCE OF A CHROMATE CONVERSION COATING.
10 - B4 DETERMINATION OF THE MASS OF CHROMATE CONVERSION COATING.

Applies to chromate conversion coatings on zinc and cadmium coatings intended to give increased corrosion protection. It does not apply to galvanized (hot-dipped) coatings generally, but caters for special cases.

This standard applies to chromate conversion coatings on zinc and cadmium coatings intended to give increased corrosion protection.NOTES:1. The zinc coating may be applied by hot-dipping (see Foreword), electroplating, or mechanical means.2. Information required to augment the standard is given in Appendix A.

Reconfirmed 1993
Under Revision see DR 03202