Ordinary temp. parkerizing liquid

A phosphating solution, normal temperature technology, applied in the field of surface chemistry, can solve the problems of high temperature of phosphating solution, long process, long film forming time, etc., and achieve strong corrosion resistance, firm combination and long film forming time Effect

Inactive Publication Date: 2003-03-12
CHINA NATIONAL HEAVY DUTY TRUCK GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Phosphating treatment of steel surface, traditionally used phosphating solution has high temperature, high energy consumption, long time and high cost
Especially for large workpieces such as automobile chassis and parts, it is difficult for some small and medium-sized enterprises to carry out medium and high temperature phosphating.
For example, Chinese patents CN1076225 and CN1077757 disclose two kinds of blackening solutions and their processes for step-by-step treatment. Although blac

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The normal temperature phosphating solution of the present invention is made up of the following materials by weight percentage:

[0021] Phosphoric acid 4.0%

[0022] Zinc oxide 0.55%

[0023] Zinc nitrate 1.5%

[0024] Nickel nitrate 3.0%

[0025] Manganese nitrate 3.5%

[0026] Sodium borofluoride 0.8%

[0027] Sodium Chlorate 2.5%

[0028] Citric acid 2.0%

[0029] Demineralized water balance

Embodiment 2

[0030] Embodiment 2: the normal temperature phosphating solution of the present invention is made up of the following materials by weight percentage:

[0031] Phosphoric acid 3.0%

[0032] Zinc oxide 0.5%

[0033] Zinc nitrate 1.0%

[0034] Nickel nitrate 3.5%

[0035] Manganese nitrate 3.0%

[0036] Sodium borofluoride 0.5%

[0037] Sodium Chlorate 2.5%

[0038] Citric acid 1.0%

[0039] Demineralized water balance

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Abstract

An ordinary-temp phosphating liquid for the phosphate treatment of surface of iron and steel contains phosphoric acid (2-4 wt.%), zinc oxide (0.4-0.6 wt.%), zinc nitrate (0.5-1.5 wt.%), nickel nitrate (3-5 wt.%), manganese nitrate (2-4 wt.%), sodium borofluorate (0.2-1 wt.%), sodium chlorate (2-3 wt.%), citric acid (0.5-2 wt.%), and softened water (the rest). Its advantages are high stability, long film-forming time, and high film strength and resistance to corrosion.

Description

(1) Technical field [0001] The invention belongs to the technical field of surface chemistry, and particularly relates to a normal temperature phosphating solution for phosphating the surface of steel. (2) Background technology [0002] For phosphating treatment of steel surface, the traditional phosphating solution has high temperature, high energy consumption, long time and high cost. Especially for large workpieces such as automobile chassis and parts, it is difficult for some small and medium-sized enterprises to carry out medium and high temperature phosphating. For example, Chinese patents CN1076225 and CN1077757 disclose two kinds of blackening liquids and their processes for step-by-step treatment. Although the step-by-step treatment can obtain a black phosphating film, the film formation is relatively loose, and the process is long and the cost is high. For example, Chinese patent CN1231705 discloses phosphating liquid and its process. The operating temperature is ...

Claims

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Application Information

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IPC IPC(8): C23C22/18C23C22/36
Inventor 于安军王子健施茜
Owner CHINA NATIONAL HEAVY DUTY TRUCK GROUP
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