Phosphating solution for drawing of low-carbon and medium-carbon steel wire rod

Abstract

The invention discloses a phosphating solution for drawing of a low-carbon and medium-carbon steel wire rod. The phosphating solution comprises the following components: 11-23 g / L of zinc dihydrogen phosphate, 16-26 g / L of zinc nitrate, 4-6 g / L of a compound accelerant, 3-8 g / L of tartaric acid and the balance of water, wherein the compound accelerant is a mixture of sodium chlorate, sodium nitrite and potassium permanganate. A preparation method of the phosphating solution comprises the steps of charging, stirring, diluting to a constant volume and the like. The phosphating solution for drawing of the low-carbon and medium-carbon steel wire rod, provided by the invention, is applicable to a lubricant coating of the low-carbon and medium-carbon steel wire rod which is not drawn; a phosphating film formed through the processing of the phosphating solution for drawing of the low-carbon and medium-carbon steel wire rod has the advantages of compact film crystal, continuity, uniformity, capability of being adsorbed on a metal surface, good heat resistance viscidity, easiness in cleaning, rust protection, good combining capacity with a lubricant medium and the like; the phosphating solution is applicable to high speed drawing, and adopts a compound accelerant system of sodium chlorate, sodium nitrite and potassium permanganate, so that content of phosphorus slag of the processed solution is low, pollution is lowered, and the environmental performance is good.

Description

technical field [0001] The invention relates to a metal cold working pretreatment agent, in particular to a medium and low carbon steel wire rod drawing phosphating solution. Background technique [0002] Metal parts are chemically treated in a phosphate solution containing zinc, iron, and manganese, and a layer of crystalline phosphate conversion film that is insoluble in water is deposited on the surface, which is called phosphating. The formed phosphate conversion film The film is called phosphating film. The main purpose of phosphating is: to provide protection to the base metal, to prevent corrosion of the metal cup to a certain extent; to play the role of anti-friction lubrication in the metal cold processing process. The reagent used in the phosphating process is the phosphating solution. [0003] At present, for the phosphating treatment of medium and low carbon steel wire rods before drawing, the existing phosphating solution products have the following problems: ...

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Problems solved by technology

[0003] At present, for the phosphating treatment of medium and low carbon steel wire rods before drawing, the existing phosphating solution products have the following problems: the bonding strength between the phosphating solution and the medium and low carbon steel wire rods is unstable, and sometimes the Or the inside of the drawing film is destroyed; the generated phosphating film has poor heat resistance and is not suitable for high-speed drawing; there are more phosphorus slag after treatment

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