Protective and Art Film of Iron and Steel by means of Oxalate with Small Amount of Phosphate

Abstract

The research was carried out to utilize the aqueous solution and precipitation of hydrophosphate (containing Zn, Mn and Fe), which decreased the activity of film-formation. And it was found that the precipitation contaning phosphate is possible to be used again asrust preventitative by the addition of a hot solution of 2_??_3 percent of oxalic acid in finely powdered state. The film thus formed is applied as a basis for a coating of paint or other materials.