LASER SCALE REMOVAL METHOD Russian patent published in 2010 - IPC C23G1/08 C23F1/28 C11D1/44 C11D3/33 

FIELD: metallurgy.

SUBSTANCE: treatment method of surface of iron-containing metal parts includes degreasing, etching and/or removal of laser scale from surfaces of iron-containing metal parts with treatment with water solution containing at least one carboxylic acid heavily soluble in water, which complexes iron ions, and at least one salt of at least the same acting carboxylic acid, and at least one ethoxylate of fatty amines as surface-active substance; at that, solution is buffered, and iron ions enter the solution and are partially complexed; at that, pH value of solution at etching has increased pH value in comparison at least to one of present carboxylic acids, and total concentration of carboxylic acids and salts of carboxylic acids at etching is 2 to 20 wt %.

EFFECT: invention allows cleaning the surfaces of iron-containing metal parts from oxide or other impurities, including laser scale, for their preparation for further treatment, and obtaining the surfaces having satisfactory resistance to corrosion and satisfactory adhesion to paint and lacquer.

10 cl, 8 ex