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Multifunctional phosphating solution, and preparation method and application thereof

A phosphating solution and multi-functional technology, applied in the coating process of metal materials, etc., can solve the problems of single phosphating function of phosphating solution, poor adhesion of paint and paint, cumbersome process and other problems, and achieve thick film thickness , long anti-rust time, wide application field effect

Inactive Publication Date: 2013-11-20
李春清
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, most phosphating solution products on the market have the following disadvantages: the general phosphating solution only has a single phosphating function, and it is necessary to derust and degrease the workpiece before phosphating the workpiece.
In addition, the process of phosphating operation is cumbersome. After the phosphating solution is treated, it needs to be washed with water, and the sewage is discharged outside, causing environmental pollution. Difference

Method used

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Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment 1

[0039] Calculate the phosphating solution prepared by the following formula in parts by mass, wherein,

[0040] Liquid A: 26 parts of diammonium hydrogen phosphate; 0.9 part of 85% phosphoric acid; 0.8 part of aluminum powder / silver powder; 0.6 part of animal glue; 0.4 part of paris plaster powder;

[0041] Liquid B: 20 ​​parts of zinc dihydrogen phosphate; 38 parts of zinc nitrate; 2 parts of sodium fluoride; 2 parts of zinc oxide; 2 parts of 85% phosphoric acid; the balance is water.

[0042] Among them, animal glue can be selected from industrial gelatin, glutinous glue, etc., and melted with hot water; metal powder is passed through a mesh sieve; diammonium hydrogen phosphate and phosphoric acid are added to the phosphating solution preparation tank, and then other ingredients, additives and accelerators are added in turn. The total acidity of the phosphating solution prepared by the above formula is relatively small, which is suitable for surface treatment with less serio...

specific Embodiment 2

[0043] The phosphating solution prepared by the following formula is calculated in parts by mass, wherein:

[0044] Liquid A: 35 parts of diammonium hydrogen phosphate; 6 parts of 85% phosphoric acid; 1.0 part of aluminum powder / silver powder; 1.0 part of animal glue; 5 parts of paris plaster powder;

[0045] Liquid B: 32 parts of zinc dihydrogen phosphate; 45 parts of zinc nitrate; 3 parts of sodium fluoride; 3 parts of zinc oxide; 4 parts of 85% phosphoric acid; the balance is water.

[0046] The process and method of preparing the phosphating solution from the above formula are the same as in Example 1. The prepared phosphating solution has a moderate total acidity and is suitable for surface treatment with a moderate degree of corrosion.

specific Embodiment 3

[0047] The phosphating solution prepared by the following formula is calculated in parts by mass, wherein:

[0048] Liquid A: 48 parts of diammonium hydrogen phosphate; 12 parts of 85% phosphoric acid; 1.8 parts of aluminum powder / silver powder; 1.4 parts of animal glue; 10 parts of paris plaster powder;

[0049] Liquid B: 46 parts of zinc dihydrogen phosphate; 55 parts of zinc nitrate; 3.8 parts of sodium fluoride; 4 parts of zinc oxide; 6 parts of 85% phosphoric acid; the balance is water.

[0050]The process of preparing the phosphating solution by the above formula is the same as in Example 1. The total acidity of the prepared phosphating solution can reach 68. This phosphating solution is most suitable for painting and using surface treatment with serious early corrosion and relatively high quality requirements. Fully react with the rust on the metal surface before the film is formed. The higher content of animal glue, metal powder and plaster of paris makes the surface ...

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Abstract

The invention relates to a multifunctional phosphating solution and a preparation method and application thereof. The multifunctional phosphating solution comprises liquid A and liquid B and is characterized in that a ratio of the liquid A to the liquid B in the multifunctional phosphating solution is 1: 0.1-1. The liquid A comprises the following substances, by mass, 26 to 48 parts of diammonium phosphate, 0.9 to 12 parts of phosphoric acid with a concentration of 85%, 0.8 to 1.8 parts of metal powder, 0.6 to 1.4 parts of animal glue, 0.4 to 10 parts of calcined gypsum powder and 0.3 to 0.8 part of alum, with the balance being water. The liquid B comprises the following substances, by mass, 20 to 46 parts of zinc dihydrogen phosphate, 38 to 55 parts of zinc nitrate, 2 to 3.8 parts of sodium fluoride, 2 to 4 parts of zinc oxide and 2 to 6 parts of phosphoric acid with a concentration of 85%, with the balance being water. The multifunctional phosphating solution provided by the invention is composed of the liquid A and the liquid B, can realize removal of oil and rust at the same time and has the efficacy of rust protection, heat insulation, high temperature resistance, heat preservation, flame retardation, noise abatement, shock prevention, isolation, pollution cleaning and resistance to fire. The multifunctional phosphating solution has the following beneficial effects: a fast rust removal speed, great thickness of a formed film, long antirust time, etc.

Description

technical field [0001] The invention relates to a multifunctional phosphating solution and its preparation method and application. The invention belongs to the technical field of surface treatment of materials such as metals. Background technique [0002] Phosphating is a commonly used pretreatment technology. The metal surface is in contact with dilute phosphoric acid or acidic phosphate, a chemical reaction occurs, and a stable insoluble phosphate protective film is formed on the metal surface. The formed protective film is a phosphating film. Phosphating The film can increase the adhesion of the coating film and improve the corrosion resistance of the coating. Phosphating solution is mainly used for pre-processing and storage of electroplating, paint or workpieces. It is used as the bottom layer of paint to enhance the bonding force between the coating film (such as paint, paint, etc.) and the workpiece, and improve the surface coating of the workpiece after painting. T...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C22/36C23G1/02
Inventor 彭万焜
Owner 李春清
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