CN1600900A

CN1600900A - Coating material for rust removal and pretreatment for surface of metal

Info

Publication number: CN1600900A
Application number: CN 03160061
Authority: CN
Inventors: 钱沛元
Original assignee: GAODI CHEMICAL TECH Co Ltd SHANGHAI
Current assignee: GAODI CHEMICAL TECH Co Ltd SHANGHAI
Priority date: 2003-09-26
Filing date: 2003-09-26
Publication date: 2005-03-30

Abstract

This invention relates to a kind of coating for rust-removing and metal surface pretreatment. It is composed of (by wt.%): phosphoric acid 50-90, oxyethyl nonyl phenol 3-10, isopropyl alcohol 0.5-10, platinum trioxide 3-10, potassium dihydrogen phosphate 0.5-10, sodium dihydrogen phosphate 3-10. This invention has advantages of: convenient use, removing surface oxidized layer, improving metal surface structure, forming non-water soluble insulation protective layer, preventing metal from producing rust.

Description

Rust cleaning and metallic surface pretreatment coating

Technical field

Invention relates to a kind of chemical coating, particularly a kind of chemical coating that is used for the process metal surfaces corrosion and increases PASS.

Background technology

Corrosion on the metal construction and corrosion layer and ruined enamelled coating are the problems that often run in industry, army and the life, and corrosion and corrosion cause last trillion dollars loss every year for global enterprise.Present derusting method is a lot, but has the derusting process complexity, and the many labour intensity of operation are big, rust cleaning is difficult to thoroughly still return shortcomings such as rust after the rust cleaning easily, particularly at following typical position, because metallic surface and coating, the problem that corrosion produces is many especially, and intractable:

1, after lacquer painting shrinks, the place of exposed contact humidity outside and air;

2, dark place, right angle: enamelled coating shrinks, and enamelled coating is cut from interior angle, produces cavity below the enamelled coating, and resident moisture causes corrosion;

3, locus of discontinuity: groove, bolt head, screw thread and zone similarity, the enamelled coating that is similar to edge and place, right angle shrinks problem;

4, weld: the hole in the weld seam, sink place and the very difficult cleaning of sharp ridge, resident anvil cinder causes that rust staining glows, and sends out blister and peeling;

5, skip welding place: skip welding can not be got rid of moisture, and doped envelope in the slit between the impossible skip welding weld seam causes to produce the rust staining that rises.

6, carry on the back obedient angle steel: the back of the body card place of angle steel is difficult to cleaning, therefore can not be coated with intact enamelled coating, causes to produce the rust staining that rises.

Summary of the invention

The purpose of this invention is to provide a kind of simple and easy to usely, rust cleaning, antirust net effect is good, and can improve the rust cleaning and the metallic surface pretreatment coating of PASS

For achieving the above object, technical scheme of the present invention is as follows:

Pretreatment coating before a kind of rust cleaning and the paint, its constituent and weight percent are:

Phosphoric acid 50%-90%,

Ethoxy nonyl phenol 3%-10%,

Virahol O.5%-10%,

Three platinum oxide 3%-10%,

Potassium primary phosphate 0.5%-10%,

SODIUM PHOSPHATE, MONOBASIC 3%-10%.

In use; the present invention mixed with suitable quantity of water (concentration is decided according to the corrosion situation; the corrosion situation is serious more, and concentration is high more), be coated in the metallic surface in modes such as sprinkling, brush or roller coating; in the zone of oxidation of removing the metallic surface; coating meeting and metal reaction, the structure of matter of change metallic surface generates a kind of insulation xln protective layer that is not dissolved in water; thereby in the generation that fundamentally prevents corrosion, and can strengthen paint sticking power.

Embodiment

Pretreatment coating before a kind of rust cleaning and the paint, its constituent and weight percent are: phosphoric acid 50%-90%, ethoxy nonyl phenol 3%-10%, Virahol 0.5%-10%, three platinum oxide 3%-10%, potassium primary phosphate 0.5%-10%, SODIUM PHOSPHATE, MONOBASIC 3%-10%.

, mix with suitable quantity of water again with batch mixes and stir by above prescription, be coated in the metallic surface in modes such as sprinkling, brush or roller coating.This coating is in the zone of oxidation of removing the metallic surface, can generate a kind of water, nonconducting crystallizing layer of being not dissolved in the metallic surface, infinitesimal anode and infinitesimal negative electrode that metallic surface stress or defective are caused play insulating effect, have alleviated the seriousness of galvanic corrosion greatly.After initial deoxygenation, generate nonconducting Resin adhesive compound, be full of space between crystal fully, form the complete insulating tectum in metallic surface, and provide very strong sticking power for paint.

The present invention can effectively remove corrosion at normal temperatures, if the present invention uses in the environment of heating, can increase the effect of rust cleaning.

As known by the technical knowledge, the utility model can be realized by other embodiments that does not break away from its spirit or essential feature.Therefore, above-mentioned disclosed embodiment with regard to each side, all just illustrates, and is not only.All in the utility model scope or the change that is being equal in the scope of the present utility model all be included in the utility model.

Claims

1, a kind of rust cleaning and metallic surface pretreatment coating, its constituent and weight percent are:

Phosphoric acid 50%-90%,

Ethoxy nonyl phenol 3%-10%,

Virahol 0.5%-10%,

Three platinum oxide 3%-10%,

Potassium primary phosphate 0.5%-10%,

SODIUM PHOSPHATE, MONOBASIC 3%-10%.