Water-based long-acting antirust agent

Abstract

A water-based long-acting antirust agent, which is composed of C8~C10 carboxylate (sodium, potassium or ammonium salt, 5.0~30.0%), ethanolamine (one, two or triethanolamine, 5.0~15.0%), boric acid (boric acid or ammonium borate, 3.0-8.0%) polyethylene glycol (8-10 ethylene glycol polymerization degree, 0.0-5.0%). The product is light yellow transparent viscous liquid. The antirust agent can dissolve the raw material in water at normal temperature or under heating. The antirust agent has a good protective effect on general carbon steel and cast iron. When used, no white spots will be formed on the metal surface, no flow marks and the original color of the metal surface will be maintained; there will be no change in the damp heat test period of more than 4 weeks. The anti-rust agent has good stability and can remain stable under high and low temperature conditions without stratification or precipitation. The product and raw materials are safe, and it has no harm to the human body and no pollution to the environment when it is prepared and used. It is an environmentally friendly and pollution-free long-term metal rust inhibitor.

Description

Technical field: [0001] The present invention relates to the field of chemical treatment of the surface of metallic materials (iron and iron alloys). Background technique: [0002] At present, for the antirust treatment of the surface of metal materials (especially for steel), water-based antirust agents used in large quantities are compounded with nitrite as the main agent. Although its antirust effect is good and the price is low, this type of antirust agent has many disadvantages: First, this type of antirust agent has great toxicity, and nitrite is a strong carcinogen, which is harmful to the human body and the environment. There is great danger. In addition, because it is a salt-based substance, it is easy to form white spots on the metal surface after use, which will affect the appearance; it is very sensitive to acid and alkali, so we must pay great attention to the effective concentration of the working fluid used, otherwise it will have the opposite effect. Not on...

AI Technical Summary

Problems solved by technology

The non-nitrite water-based antirust agent provided by CN 1530463 (application number 03111171) has got rid of nitrite, but it uses many kinds of raw materials and complicated preparation methods (divided into two components of A and B, heated and melted three times) , reaction), there are many inconveniences in actual use