A kind of antirust liquid for inner cavity of parts

Abstract

The invention relates to an antirust solution for the inner cavity of a part, which is characterized in that it consists of the following raw materials in parts by weight: 1.5-4.5 parts of an organic acid with a molecular formula of C6H18O24P6, 10-18 parts of triethanolamine, 0- 3.5 parts of citric acid, 5-15 parts of refined sodium petroleum sulfonate, 0.5-4 parts of fatty alcohol polyoxyethylene ether AEO3, 0-2 parts of sodium molybdate, 0-0.5 parts of polyethylene glycol 6000 bis Stearic acid ester, 0-0.5 part of sodium hydroxide, 0.5-1 part of industrial alcohol, 0-500ppm industrial fungicide, 50-82 part of tap water. It meets the antirust requirements of automotive cast iron or steel parts, does not contain volatile acids, heavy metal ions, and sodium nitrite, and has the characteristics of no rust residue, long antirust cycle, low cost, and no pollution. It can be used in large quantities It is applied to the rust prevention of cast iron and steel automotive inner cavity parts, and the economic benefit is remarkable.

Description

Technical field: [0001] The invention relates to an antirust liquid for inner cavities of parts, which is applied to the antirust field of inner cavities of cast iron or steel parts of automobiles. technical background: [0002] According to information, the total amount of metal lost due to corrosion and rust in the world is more than 20% of the annual output, and the resulting economic loss is about 1 trillion US dollars. [0003] In 1999, "Guangming Daily" reported that my country's annual corrosion loss was 280 billion yuan, which shows that the loss caused by metal corrosion is huge. [0004] When the metal is in contact with the surrounding medium, the damage caused by chemical and electrochemical actions is called metal corrosion, and the presence of water and the formation of rust is called rust. Except for a few metals, such as gold, platinum, and titanium, all metals have a tendency to transform into ions, which means that metal corrosion is a spontaneous and ubiq...

AI Technical Summary

Problems solved by technology

[0014] Application No. 03146767 is 'a neutral oil and rust remover'; application No. 95112070 is 'a kind of acid-free pickling solution' which not only has a slow derusting speed and poor derusting effect, but also contains a large amount of high-cost raw materials. Can not meet the characteristics of mass production of automobiles

[0015] Application No. 88100464 is 'A Low-Temperature Rapid Derusting Solution for Removing Oxidation Layers on Iron and Steel Surfaces'; Application No. 01131523 is 'A Rust-Removing and Antirust Solution for Treating Metal Surface Corrosion'; Application No. 02154470 'A formula for anti-rust and rust-removing liquid on steel surface'; application number 93102793 'a rust-resistant steel surface treatment liquid'; application number 88103516 'steel surface rust and anti-rust treatment agent'; application number 95110621 Patents such as 'a wide temperature phosphating solution for degreasing, rust removal and passivation' or containing volatile hydrochloric acid; or containing polluting ingredients restricted by environmental protection such as chromium trioxide or potassium dichromate, cannot be applied to automobiles in production