Development, characteristics and properties of wash primers are explained. Data are given on wash primers principally because of their efficiency and wide use. Reactive and non-reactive types resulted from efforts to undertand better the reactions involved and as a result of efforts to produce a one-package system.

Reacted wash primers are made by reacting phosphoric acid and chromium oxide in a solution of butyral resin at high temperature, producing a clear green lacquer. Non-reactive primers are prepared by dispersing chromates of lead, strontium and barium in a solution of butyral resin and then adding phosphoric acid. A stable wash primer was prepared by dispersing chromic phosphate in a solution of PVB. 5.4.5

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Copyright 1959 by the National Association of Corrosion Engineers.
1959
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