Zinc-iron metal alramenting liquid capable of being recycled at normal temperature

A metal surface and phosphating solution technology, which is applied in the coating process of metal materials, etc., can solve the problems of phosphating, such as sediment and discharge that need to be washed with water, harsh working environment, and uneven film formation, so as to reduce energy consumption and facilitate maintenance , reduce the effect of the operation process

Inactive Publication Date: 2011-01-05
NANJING YOUWEI CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a highly efficient, economical and environmentally friendly metal surface phosphating solution that can be recycled at normal temperature to overcome the traditional phosphating process with complicated procedures, high temperature, harsh working environment...

Method used

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  • Zinc-iron metal alramenting liquid capable of being recycled at normal temperature

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The present embodiment is formulated by weight ratio by following components:

[0031] Phosphoric acid 14%

[0032] Zinc Oxide 5.6%

[0033] Zinc nitrate 13.3%

[0034] Citric acid 0.56%

[0035] Tartaric acid 0.56%

[0036] Molybdate 0.35%

[0037] water balance

[0038] This embodiment is applicable to the phosphating treatment on the surface of various ferrous metal workpieces before spraying at normal temperature, and the treatment time is 6-15 minutes, wherein the molybdate is sodium molybdate.

Embodiment 2

[0040] The present embodiment is formulated by weight ratio by following components:

[0041] Phosphoric acid 21%

[0042] Zinc Oxide 4.9%

[0043] Zinc nitrate 15.4%

[0044] Citric acid 0.42%

[0045] Tartaric acid 0.35%

[0046] Molybdate 0.56%

[0047] water balance

[0048] This embodiment is applicable to the phosphating treatment before spraying on the surface of various ferrous metal workpieces at normal temperature, and the treatment time is 6-15 minutes, wherein the molybdate is zinc molybdate. .

Embodiment 3

[0050] Phosphoric acid 28%

[0051] Zinc Oxide 4.2%

[0052] Zinc nitrate 17.5%

[0053] Citric acid 0.28%

[0054] Tartaric acid 0.14%

[0055] Molybdate 0.7%

[0056] water balance

[0057] This embodiment is applicable to the phosphating treatment on the surface of various ferrous metal workpieces at room temperature before spraying, and the treatment time is 6-15 minutes, wherein the molybdate is ammonium molybdate.

[0058] The following table is that the present invention and the characteristics of each index of traditional phosphating solution are compared as follows:

[0059]

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PUM

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Abstract

The invention relates to a zinc-iron metal alramenting liquid capable of being recycled at normal temperature. The invention is characterized in that the alramenting liquid is prepared by the following raw materials by weight percent: 14-28% of phosphoric acid, 3.5-7% of zinc oxide, 12.6-17.5% of zinc nitrate, 0.14-0.56% of citric acid, 0.14-0.7% of tartaric acid and 0.14-0.84% of molybdate, and balance of water.In the invention, phosphorization is carried out in one process after oil removing and rust removing are carried out, the processes of neutralizing, surface conditioning, passivating and washing are eliminated, and a compact and uniform phosphorization membrane with strong adhesive force is rapidly formed on the surface of ferrous metal. The process greatly reduces operation procedure, the phosphorization process produces no slag, thus reducing pollution to the environment and greatly improving utilization factor of material; and energy consumption at normal temperature is reduced and water is saved. The invention has the advantages of wide application range, less investment, high efficiency and high safety, and bath solution has good stability, no deterioration or volatilization is caused, and maintenance is easy, thus being beneficial to follow-up spraying processes.

Description

technical field [0001] The invention relates to a novel environment-friendly phosphating solution for the surface treatment of ferrous metals such as iron and steel, in particular to a recyclable phosphating solution for the surface of zinc-iron metals at normal temperature. Background technique [0002] The metal is treated in a solution containing phosphate, and the phosphate chemical conversion film formed on the surface is called a phosphating film. For more than 100 years, phosphating technology has been widely used in automobiles, military industry, electrical appliances, machinery and other fields. Its main uses are anti-rust, wear-resistant and friction-reducing, lubricating, and painting the bottom layer. [0003] The existing traditional phosphating process is to use phosphating solution to phosphate the surface of metal materials and metal products at high temperature. This method has the disadvantages of high energy consumption, long processing time, unstable pho...

Claims

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Application Information

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IPC IPC(8): C23C22/42
Inventor 陈兆林雷忠祥陈吉武
Owner NANJING YOUWEI CHEM
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