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Composition for steel phosphating and preparation method thereof

A composition and steel technology, applied in the coating process of metal materials, etc., can solve the problems of slow phosphating iron and steel materials, long time required for phosphating, insufficient brightness of color, etc., and achieve fast phosphating speed and low raw material price , bright color effect

Active Publication Date: 2015-02-18
浙江迪特高强度螺栓有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The patent application number 201210096112.2 discloses a composition for iron and steel phosphating. This phosphating composition also has the problems of slow phosphating of iron and steel materials and a long time for phosphating, and the resulting phosphating film is gray To black, the color is not bright enough

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  • Composition for steel phosphating and preparation method thereof

Examples

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Embodiment 1

[0028] A composition for iron and steel phosphating consists of the following components in parts by mass: 2 parts of sodium nitrate, 2 parts of sodium citrate, 15 parts of manganese dihydrogen manganese phosphate, 5 parts of magnesium oxide, 10 parts of nickel nitrate, 2 parts of copper sulfate, 1 part of sulfosalicylic acid, 2 parts of polyethylene glycol, 500 parts of deionized water.

[0029] A preparation method for a composition for iron and steel phosphating, comprising the following steps:

[0030] a. Weigh the components according to the number of parts by mass, divide the deionized water into two parts, and then add sodium nitrate, copper sulfate, manganese dihydrogen manganese phosphate, nickel nitrate and magnesium oxide to one part of the deionized water , stir for 3 minutes until completely dissolved, and control the stirring speed to 40 rpm;

[0031] b. Add sodium citrate, sulfosalicylic acid and polyethylene glycol to another part of deionized water, stir for ...

Embodiment 2

[0034] A composition for iron and steel phosphating consists of the following components in parts by mass: 6 parts of sodium nitrate, 4 parts of sodium citrate, 25 parts of ferric manganese phosphate, 10 parts of magnesium oxide, 20 parts of nickel nitrate, 5 parts of copper sulfate, 3 parts of sulfosalicylic acid, 5 parts of polyethylene glycol, 900 parts of deionized water.

[0035] A preparation method for a composition for iron and steel phosphating, comprising the following steps:

[0036] a. Weigh the components according to the number of parts by mass, divide the deionized water into two parts, and then add sodium nitrate, copper sulfate, manganese dihydrogen manganese phosphate, nickel nitrate and magnesium oxide to one part of the deionized water , stir for 4 minutes until completely dissolved, and control the stirring speed to 45 rpm;

[0037] b. Add sodium citrate, sulfosalicylic acid and polyethylene glycol to another part of deionized water, stir for 6 minutes un...

Embodiment 3

[0040] A composition for iron and steel phosphating consists of the following components in parts by mass: 3 parts of sodium nitrate, 2 parts of sodium citrate, 18 parts of manganese dihydrogen manganese phosphate, 6 parts of magnesium oxide, 12 parts of nickel nitrate, 3 parts of copper sulfate, 2 parts of sulfosalicylic acid, 3 parts of polyethylene glycol, 700 parts of deionized water.

[0041] A preparation method for a composition for iron and steel phosphating, comprising the following steps:

[0042] a. Weigh the components according to the number of parts by mass, divide the deionized water into two parts, and then add sodium nitrate, copper sulfate, manganese dihydrogen manganese phosphate, nickel nitrate and magnesium oxide to one part of the deionized water , stir for 5 minutes until completely dissolved, and control the stirring speed to 55 rpm;

[0043] b. Add sodium citrate, sulfosalicylic acid and polyethylene glycol to another part of deionized water, stir for...

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Abstract

The invention discloses a composition for steel phosphating and a preparation method thereof. The composition is composed of the following components in parts by mass: 2-6 parts of sodium nitrate, 2-4 parts of sodium citrate, 15-25 parts of iron manganese dihydrogen phosphate, 5-10 parts of magnesium oxide, 10-20 parts of nickel nitrate, 2-5 parts of copper sulfate, 1-3 parts of sulfosalicylic acid, 2-5 parts of polyethyleneglycol and 500-900 parts of deionized water. The preparation method comprises the following steps: a. weighing the components according to parts by mass; b. adding the sodium citrate, sulfosalicylic acid and polyethyleneglycol into another deionized water; and c. uniformly mixing the solutions obtained in the step a and step b. The composition for steel phosphating can complete phosphating within 8-10 minutes, and has the advantages of high phosphating speed and short required lime for phosphating; and the surface of the phosphated steel has bright color.

Description

technical field [0001] The invention relates to the technical field of iron and steel surface treatment, in particular to a composition for iron and steel phosphating and a preparation method thereof. Background technique [0002] Steel is the most widely used structural material in modern times. In order to make it able to withstand the corrosion of oxygen and water in the atmosphere, the surface of steel materials is usually treated to form a film on the surface that can protect the metal from water and other corrosive media. For example, phosphating can be carried out on the surface of steel materials. [0003] Phosphating is a process in which chemical and electrochemical reactions form a phosphate chemical conversion film, and the formed phosphate conversion film is called a phosphating film. The purpose of phosphating is mainly as follows: 1. To provide protection for the base metal and prevent the metal from being corroded to a certain extent; It is used for anti-fr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C22/07
CPCC23C22/07
Inventor 尤为
Owner 浙江迪特高强度螺栓有限公司
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