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A kind of pretreatment phosphating solution for high carbon steel wire drawing and preparation method thereof

A technology of high carbon steel wire and phosphating solution, applied in the field of phosphating solution, can solve the problems of difficulty in control, deterioration of phosphating solution, uneven thickness of phosphating film, etc. effect of speed

Active Publication Date: 2017-05-03
NINGBO BST METAL PROD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The electrolytic phosphating of the prior art has the following problems: the thickness of the phosphating film formed on the surface of the steel wire is uneven, and it is difficult to control the occurrence of other reactions other than the phosphating reaction, and the phosphating solution deteriorates

Method used

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  • A kind of pretreatment phosphating solution for high carbon steel wire drawing and preparation method thereof
  • A kind of pretreatment phosphating solution for high carbon steel wire drawing and preparation method thereof
  • A kind of pretreatment phosphating solution for high carbon steel wire drawing and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0026] The phosphating solution of the present invention is made up of following raw materials:

[0027]

[0028] Add zinc oxide into a small amount of water to make a paste, then add phosphoric acid and stir until fully dissolved. Then add zinc nitrate and the compound of formula I, add water to the use height, heat and stir to constant volume. The pH is controlled at 4, and the temperature is controlled at 65°C. The film forming speed of this phosphating solution formula is slow, and the phosphating film is black, thick, and loose, and is suitable for larger steel wires.

Embodiment 2

[0030] The phosphating solution of the present invention is made up of following raw materials:

[0031]

[0032] The preparation method is the same as in Example 1, the pH is controlled at 5, and the temperature is controlled at 70°C. This phosphating solution formula has a moderate phosphating and film-forming speed, and the phosphating film is black, moderately thick, and dense, and is suitable for a wide range of steel wire specifications.

Embodiment 3

[0034]

[0035]

[0036] The preparation method is the same as in Example 1, the pH is controlled at 6, and the temperature is also controlled at 75°C. This kind of phosphating solution has a faster phosphating film forming speed, and the phosphating film is gray-black, thinner and dense, and is suitable for steel wires with smaller specifications.

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Abstract

The invention discloses phosphorizing liquid for pretreating a high-carbon steel wire before drawing and a preparation method of the phosphorizing liquid.The phosphorizing liquid is prepared from phosphoric acid, zinc nitrate, zinc oxide, a compound as shown in formula I, and water; zinc oxide is added to little water and mixed into paste; then phosphoric acid is added and agitated; zinc nitrate and the compound as shown in formula I are added after phosphoric acid is dissolved; water is added until reaching the use height; then the heating ad agitating are performed, and the volume is fixed; the temperature in phosphorizing liquid preparation is controlled to be 65 to 75 DEG C; the prepared phosphorizing film is thick, uniform, dense, high in corrosion resistance, fast to form, and wide in applicable scope of the steel wire according to the specification.

Description

technical field [0001] The invention relates to a phosphating solution, in particular to a phosphating solution used for pretreatment before drawing high-carbon steel wires and a preparation method thereof. Background technique [0002] Steel wire is one of the four major types of steel plates, tubes, shapes and wires, and is a reprocessed product made of hot-rolled wire rods through cold drawing. The main process of steel wire production includes raw material selection, iron scale removal, drying, coating treatment, heat treatment, wire drawing, coating treatment, etc. [0003] Phosphating treatment is usually required before steel wire drawing, especially for special steel and high carbon steel. Lubricant, so that the lubricant is brought into the die hole during the steel wire drawing process, and an effective lubricating mold is formed between the steel wire and the die hole, which facilitates the smooth deformation and stretching of the steel wire. However, the thickn...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C22/07C07F15/04
Inventor 鲍伟平
Owner NINGBO BST METAL PROD
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