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Phosphating liquid and preparation method thereof

A technology of phosphating liquid and phosphoric acid, applied in the field of phosphating liquid, can solve the problems of fast phosphating liquid at room temperature and other problems that have not been seen in phosphating treatment

Inactive Publication Date: 2011-10-12
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] So far, there is no room temperature rapid phosphating solution for phosphating large-scale outdoor equipment (Li Xiantao, Wei Yu. The role of sodium molybdate in room temperature phosphating [J] Material Protection, 2009, 42(2): 35)

Method used

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  • Phosphating liquid and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The phosphating solution of the present invention is made up of following raw materials:

[0032] Zinc oxide 1.5g / L;

[0033] Calcium nitrate 0.6g / L;

[0034] Phosphoric acid 97.5mL / L;

[0035] Hydroquinone 10g / L;

[0036] Tartaric acid 10g / L;

[0037] Citric acid 6g / L;

[0038] Nickel acetate 1g / L;

[0039] Sodium fluoride 3g / L;

[0040] Sodium molybdate 3g / L;

[0041] Potassium chlorate 2g / L;

[0042] water balance.

[0043] Add zinc oxide into a small amount of water to make a paste, then add phosphoric acid and stir until fully dissolved. Then add calcium nitrate, hydroquinone, tartaric acid, citric acid, nickel salt, sodium fluoride, sodium molybdate, and potassium chlorate in sequence, stir evenly, and finally add enough water to make up to volume. It is applied by brushing to deal with large iron supports on construction sites. The effect is good, the film is formed uniformly, and the adhesion to the paint film is good.

Embodiment 2

[0045] The phosphating solution of the present invention is made up of following raw material:

[0046] Zinc oxide 1.7g / L;

[0047] Calcium nitrate 0.5g / L;

[0048] Phosphoric acid 111.4mL / L;

[0049] Hydroquinone 20g / L;

[0050] Tartaric acid 6g / L;

[0051] Citric acid 2g / L;

[0052] Nickel sulfate 2g / L;

[0053] Sodium fluoride 1g / L;

[0054] Sodium molybdate 1g / L;

[0055] Potassium chlorate 1g / L;

[0056] water balance.

[0057] The preparation method is the same as that in Example 1, and the method of spraying is used to treat the iron railings of ordinary trucks. The effect is good, the film layer is uniform off-white, and has good bonding force with the paint film.

Embodiment 3

[0059] The phosphating solution of the present invention is made up of following raw material:

[0060] Zinc oxide 2g / L;

[0061] Calcium nitrate 0.5g / L;

[0062] Phosphoric acid 111.4mL / L;

[0063] Hydroquinone 10g / L;

[0064] Tartaric acid 8g / L;

[0065] Citric acid 4g / L;

[0066] Nickel sulfate 2g / L;

[0067] Sodium fluoride 1g / L;

[0068] Sodium molybdate 2g / L;

[0069] Potassium chlorate 1.6g / L;

[0070] water balance.

[0071] Preparation method is with embodiment 1. Use the method of brushing to deal with the iron door that has been sanded to remove floating rust. The effect is good, the film is uniform, and the bonding force with the paint film is good.

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Abstract

The invention provides a phosphating liquid and a preparation method thereof, relating to a phosphating liquid. The invention particularly provides a phosphating liquid which has the advantages of high film forming speed, high varnish film cohesion, good corrosion resistance, low cost and the like, can be painted or sprayed, is simple to operate and is applicable to large workpieces or outdoor equipment, and a preparation method thereof. The phosphating liquid comprises the following raw materials: zinc oxide, calcium nitrate, phosphoric acid, hydroquinone, tartaric acid, citric acid, nickel salt, sodium fluoride, sodium molybdate, potassium chlorate and water. The preparation method of the phosphating liquid comprises the following steps: adding the zinc oxide into a small amount of water, and preparing into a paste; adding the phosphoric acid, and sequentially adding the calcium nitrate, hydroquinone, tartaric acid, citric acid, nickel salt, sodium fluoride, sodium molybdate and potassium chlorate after the phosphoric acid is dissolved; and uniformly stirring, and adding water to a certain volume, thus obtaining the phosphating liquid.

Description

technical field [0001] The invention relates to a phosphating solution, in particular to a phosphating solution suitable for surface phosphating treatment of steel parts before painting and a preparation method thereof. Background technique [0002] In order to improve the anti-rust ability of the surface of steel parts, the surface is usually phosphating. Phosphating film is mainly used as the bottom layer of paint, lubricating layer during metal cold working, and metal surface protection layer, etc., which can play various functions such as rust prevention, wear reduction, lubrication, and improvement of adhesion between paint and metal substrate. The current development direction of phosphating technology is mainly to improve quality and reduce pollution, energy saving, non-toxic and environmentally friendly, and further clean phosphating. Phosphating solution should save materials and energy, and have reasonable functions. The product should not be used during and after ...

Claims

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Application Information

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IPC IPC(8): C23C22/44
Inventor 王周成赵梓岑严维力
Owner XIAMEN UNIV
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