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A phosphating solution suitable for metal fasteners

A metal fastener and phosphating solution technology, applied in the field of phosphating solution, can solve the problems of long processing time, large corrosion, high cost, etc., and achieve the effects of saving energy and time, strong corrosion resistance, and short film forming time

Active Publication Date: 2016-08-03
LIUZHOU YUHUA TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the traditionally used phosphating solution has high temperature, high energy consumption, long processing time, and high cost. In recent years, there have been reports on the normal temperature phosphating solution on the market, but in the process of use, the processing time is too long, and its Acidic substances have great corrosion on the surface of metal fasteners, and if it is not serious, it will affect the quality of phosphating

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Embodiment 1 prepares phosphating solution and applies

[0016] The formula is: phosphoric acid 3.5%, zinc oxide 0.6%, nitric acid 0.25%, nickel nitrate 4.0%, zinc nitrate 1.0%, nickel sulfate 1.5%, zinc sulfate 5.5%, manganese carbonate 0.2%, ethylenediaminetetraacetic acid 0.02%, lemon Acid 2.0%, tartaric acid 2.8%, sodium perborate 0.7%, sodium carbonate 2.3%, potassium chlorate 1.7%, and the balance is water.

[0017] The preparation method is as follows: at normal temperature, take all components except water, add into water, stir until completely dissolved, and obtain.

[0018] The method of use is: dilute with 15 times the volume ratio, soak the surface of the screw, the construction time is 5 minutes, and the use temperature is 25 ℃.

Embodiment 2

[0019] Embodiment 2 prepares phosphating solution and applies

[0020] The formula is: phosphoric acid 2.3%, zinc oxide 0.4%, nitric acid 0.3%, nickel nitrate 4.5%, zinc nitrate 0.8%, nickel sulfate 1.0%, zinc sulfate 6.0%, manganese carbonate 0.3%, ethylenediaminetetraacetic acid 0.01%, lemon Acid 1.5%, tartaric acid 3.0%, sodium perborate 0.9%, sodium carbonate 2.0%, potassium chlorate 1.5%, and the balance is water.

[0021] The preparation method is as follows: at normal temperature, take all components except water, add into water, stir until completely dissolved, and obtain.

[0022] The method of use is: dilute with 15 times the volume ratio, soak the surface of the screw, the construction time is 8 minutes, and the use temperature is 20 ℃.

Embodiment 3

[0023] Embodiment 3 prepares phosphating solution and applies

[0024] The formula is: phosphoric acid 3.8%, zinc oxide 0.8%, nitric acid 0.2%, nickel nitrate 3.5%, zinc nitrate 1.2%, nickel sulfate 2.0%, zinc sulfate 5.0%, manganese carbonate 0.1%, ethylenediaminetetraacetic acid 0.03%, lemon acid 2.5%, tartaric acid 2.5%, sodium perborate 0.5%, sodium carbonate 2.5%, potassium chlorate 1.8%, and the balance is water.

[0025] The preparation method is as follows: at normal temperature, take all components except water, add into water, stir until completely dissolved, and obtain.

[0026] The method of use is: dilute with 15 times the volume ratio, soak the surface of the screw, the construction time is 3 minutes, and the use temperature is 30 ℃.

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Abstract

The invention discloses a phosphating solution suitable for a metal fastening piece, which comprises the following constituents in percentage by weight: 3.5% of phosphate, 0.6% of zinc oxide, 0.25% of nitric acid, 4.0% of nickel nitrate, 1.0% of zinc nitrate, 1.5% of nickel sulfate, 5.5% of zinc sulfate, 0.2% of manganese carbonate, 0.02% of ethylene diamine tetraacetic acid, 2.0% of citric acid, 2.8% of tartaric acid, 0.7% of peroxydol, 2.3% of soda, 1.7% of potassium chlorate, and the balance of water. The application method the phosphating solution is that: diluting at 15 times of volume ratio and soaking screw surface, wherein the construction time is 3-40 minutes and the application temperature is 15-40 DEG C. The phosphating solution provided by the invention is not limited by natural conditions when being used in ordinary temperature, and can be subjected to soaking, sprinkling or wiping according to the size of the workpiece to be processed; the phosphating solution which is already subjected to phosphating can form good-performance densified phosphating crystallization film on the surface of the metal fastening piece, which is continuous and uniform; and moreover, the film is short in forming time and strong in forming strength, and is strong in corrosion resistance, and the quality completely meets the requirement.

Description

technical field [0001] The invention discloses a phosphating solution suitable for metal fasteners. Background technique [0002] As we all know, in order to improve the anti-corrosion performance of the surface of metal fasteners, the surface of metal fasteners often needs to be sprayed or sprayed to prevent the surface of metal fasteners from reacting with oxygen and moisture in the air, thereby preventing metal fasteners from being damaged. corrosion. In order to improve the adhesion of topcoat or plastic spraying, metal fasteners need to be pre-treated before surface spraying or painting. At present, the pretreatment liquid commonly used in the market is the phosphating liquid mainly suitable for iron and steel, including bathing liquid and replenishing liquid. However, the traditionally used phosphating solution has high temperature, high energy consumption, long processing time, and high cost. In recent years, there have been reports on the normal temperature phospha...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C22/17
Inventor 韦筠寰
Owner LIUZHOU YUHUA TECH
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