Specifies abrasive blastcleaning methods for the preparation of steel surfaces before coating with paints and related products.

This Standard specifies abrasive blast cleaning methods for the preparation of steel surfaces before coating with paints and related products. It also contains information on the effectiveness of the individual methods and their fields of application.NOTES:Information on purchasing guidelines may be found in Appendix A.Information on abrasive blasting of surfaces other than steel is discussed in Appendix D.This Standard is applicable to new and corroded steel surfaces and also to steel surfaces that are uncoated or have been previously coated with paints and related products.These methods are essentially intended for the surface preparation of hot-rolled steel but could also be used for cold-rolled steel of sufficient thickness to withstand the deformation caused by the impact of abrasive.Items considered as a part of surface preparation before coating are edge grinding, removal of grease and oil, removal of weld spatter, removal of burrs and other sharp edges, grinding of welds, filling of pits, porosity of welds and other surface imperfections and removal of water-soluble contaminants that may cause premature failure of the coating system (see AS1627.0 for more information). Such defects cannot be satisfactorily treated by abrasive blast cleaning.WARNING: THE PROCEDURES DESCRIBED IN THIS STANDARD ARE INTENDED TO BE CARRIED OUT BY SUITABLY TRAINED AND SUPERVISED PERSONNEL. THE SUBSTANCES AND PROCEDURES USED IN THESE METHODS MAY BE INJURIOUS TO HEALTH IF ADEQUATE PRECAUTIONS ARE NOT TAKEN. ATTENTION IS DRAWN IN THE TEXT TO CERTAIN SPECIFIC HAZARDS. THIS STANDARD REFERS TO THE TECHNICAL SUITABILITY OF THE METHODS AND DOES NOT ABSOLVE THE USER FROM STATUTORY OBLIGATIONS RELATING TO HEALTH AND SAFETY.NOTE: For guidance on working place hazards refer to Appendix C.

First published as AS CK9.4-1964.Revised and redesignated as AS 1627.4-1974.Second edition 1989.Third edition 2002.Fourth edition 2005.Reconfirmed 2017. Originated as AS CK9.4-1964. Previous edition AS 1627.4-2002. Fourth edition 2005.