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Bonderite process before lacquering steel surface

A technology for phosphating treatment and steel surface, applied in the field of surface chemistry, it can solve the problems of reducing the anti-corrosion performance of phosphating film, affecting the service life of steel, and not doing chemical processing, saving large equipment and workshops, easy operation, and corrosion resistance. strong effect

Inactive Publication Date: 2007-10-31
宋晨玮
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

At present, many domestic iron and steel product processing enterprises only do simple degreasing and derusting treatment on the metal surface before processing and painting the steel products, and do not do detailed chemical processing, which lays hidden dangers for the future use of iron and steel materials, namely After half a year to one year of use, rust begins to appear, seriously affecting the service life of the steel
Some existing phosphating technologies have high operating temperature, unstable bath solution, and easy occurrence of sediment, which reduces the anti-corrosion performance of the phosphating film

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] The phosphating treatment agent before painting the surface of iron and steel materials, the ratio of parts by weight is: phosphoric acid 3, zinc dihydrogen phosphate 8, zinc nitrate 6, nickel nitrate 3, sodium borofluorate 0.1, sodium chlorate 0.5, citric acid 1 , sodium nitrite 1, demineralized water 45. The unit is kilogram.

Embodiment 2

[0018] The phosphating treatment agent before painting the surface of iron and steel materials, the ratio of parts by weight is: phosphoric acid 4, zinc dihydrogen phosphate 7, zinc nitrate 6, nickel nitrate 2, sodium borofluorate 1, sodium chlorate 1, citric acid 2 , sodium nitrite 2, demineralized water 55. The unit is kilogram.

Embodiment 3

[0020] The phosphating treatment agent before painting the surface of iron and steel materials, its weight and number ratio is: phosphoric acid 5, zinc dihydrogen phosphate 6, zinc nitrate 4, nickel nitrate 1, sodium borofluorate 1.5, sodium chlorate 0.5, citric acid 1 , sodium nitrite 2, demineralized water 52. The unit is kilogram.

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PUM

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Abstract

The invention discloses a phosphating additive before tinting of metallic surface in surface chemical technical domain, which comprises the following steps: allocating with mass ratio as 3-7 phosphoric acid, 2-8 zinc dihydrogenphosphate, 1-6 zinc nitrate, 1-3 nickel nitrate, 0. 1-3 sodium fluoroborate, 0. 5-4 sodium chlorate, 1-3 citric acid, 1-4 sodium nitrite and 50-65 soften water; getting the product. This invention can be used to proceed phosphate treatment for metallic surface.

Description

Technical field: [0001] The invention belongs to the technical field of surface chemistry, in particular to a method for phosphating the steel surface before painting. Background technique [0002] Phosphating treatment agent for steel surface before painting. At present, many domestic iron and steel product processing enterprises only do simple degreasing and derusting treatment on the metal surface before processing and painting the steel products, and do not do detailed chemical processing, which lays hidden dangers for the future use of iron and steel materials, namely After half a year to one year of use, rust begins to appear, which seriously affects the service life of the steel. Some existing phosphating technologies have high operating temperature, unstable bath solution, and easy occurrence of sediment, which reduces the anti-corrosion performance of the phosphating film. content of the invention [0003] The object of the present invention is to provide a kind...

Claims

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Application Information

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IPC IPC(8): C23C22/27
Inventor 宋晨玮
Owner 宋晨玮
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