What pre-treatment is required before metal parts are coated with Plascoat PPA 571?
The surface of the items to be coated must be free from rust, grease, scale and other impurities. A fully satisfactory substrate is obtained by blasting with sharp-edged materials until the standard purity rating SA 2 to DIN 55928, Part 4, is reached. Chemical activation and de-rusting with subsequent phosphating is also possible and yields and excellent substrate for coating. For steel surfaces, good results have been obtained by iron phosphating for dip coating and zinc phosphating for electrostatic spraying; with galvanised articles, chromating or special zinc phosphating processes have proved effective. It is important that you read the recommended pre-treatment guide and read the instructions on each of the technical data sheets.
