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Low-temperature phosphating solution containing chromic acid

A low-temperature phosphating and chromic acid technology, which is applied in the coating process of metal materials, can solve the problems of low working temperature, low working efficiency and high working temperature, and achieve the effect of low working temperature, high working efficiency and excellent performance

Inactive Publication Date: 2012-12-12
BENGBU FUWOTE WHEEL MFG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing phosphating solution has the following problems when processing workpieces: 1. The working temperature is high and the energy consumption is large; 2. The working temperature is not high, but the working time is long and the working efficiency is low

Method used

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  • Low-temperature phosphating solution containing chromic acid
  • Low-temperature phosphating solution containing chromic acid
  • Low-temperature phosphating solution containing chromic acid

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Embodiment Construction

[0017] A low-temperature phosphating solution containing chromic acid, each raw material component is one of the formulas listed in the following table (g):

[0018]

[0019] .

[0020] The preparation method comprises the following steps:

[0021] (1) Dilute phosphoric acid at a ratio of 1:10, stir thoroughly, and place for 20-24 hours;

[0022] (2) Then add zinc oxide in the proportion of formula, stir thoroughly, and cool for 9-11 hours to obtain a mixture of phosphoric acid and zinc oxide;

[0023] (3) After fully mixing other ingredients in the formula, add it to the mixture in step (2), and stir well.

[0024] The following table is that the present invention and the characteristics of each index of traditional phosphating solution are compared as follows:

[0025] this invention

[0026] When working: Prepare the above-mentioned phosphating solution stock solution and water at a ratio of 1:25 to make a working solution, first pour water into the phospha...

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Abstract

The invention provides a low-temperature phosphating solution containing chromic acid. The phosphating solution is prepared by the following components by weight: 170 to 180 parts of phosphoric acid, 48 to 52 parts of zinc oxide, 2 to 3 parts of ammonium molybdate, 4 to 6 parts of citric acid, 1 to 2 parts of sodium sulfate, 2 to 2.5 parts of bismuth molybdate, 0.8 to 1.2 parts of chromic acid and 1700 to 1800 parts of water. The phosphating solution has the advantages of low working temperature, low energy consumption, little sediment, short phosphating time, high working efficiency, reduction in pollution, environment protection, uniform and dense phosphating film, and good luster appearance. After the phosphating solution is used for spraying or soaking steel iron, a dense phosphated crystallized film with excellent performance can be formed on the surface of the steel iron.

Description

technical field [0001] The invention relates to the field of metal surface pretreatment, in particular to a low-temperature phosphating solution containing chromic acid. Background technique [0002] Phosphating is a commonly used pre-treatment technology. The main purpose of phosphating is to provide protection for the base metal and prevent the metal from being corroded to a certain extent; it is used as a primer before painting to improve the adhesion and corrosion resistance of the paint film layer. ; It is used for anti-friction lubrication in metal cold working process. The existing phosphating solution has the following problems when processing workpieces: 1. The working temperature is high and the energy consumption is large; 2. The working temperature is not high, but the working time is long and the working efficiency is low. Contents of the invention [0003] The invention provides a low-temperature phosphating solution containing chromic acid. The phosphating ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C22/43
Inventor 年君
Owner BENGBU FUWOTE WHEEL MFG TECH
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