Antirust agent composition and antirust method using the same

Abstract

The invention provides an antirust agent composition and an antirust method using the same. The antirust agent composition comprises a aliphatic carboxylic acid represented by general formula (1), and a aromatic carboxylic acid represented by general formula (2), and is formed by using organic base through adjustment in the way of changing pH to be in the range of 5 to 10, and can be used both for ferrous metal raw materials and non-ferrous metal raw materials. The antirust performance and finish machining performance are excellent, and an antirust method can be provided by using the antirust agent composition. R1-(COOH)n (1), in the formula (1), R1 represents an alkyl group in the form of a straight chain or branches which acts as an alkyl group, an alkenyl group or an alkanol group with the carbon number being 1 to 17, and n represents a number of 1 to 3. R2-(COOH)n (2), in the formula (2), R2 represents an aromatic alkyl group, and n represents a number of 1 to 3.

Description

technical field [0001] The invention relates to a rust preventive composition and a rust preventive method using the same. Background technique [0002] Conventionally, various water-soluble rust preventives have been proposed and utilized as water-soluble rust preventives. For example, water-soluble rust preventives using inorganic salts such as chromate, nitrite, and phosphate are known. However, chromate has been pointed out to be highly toxic, nitrite has been pointed out to be carcinogenic, and phosphate has been pointed out to cause eutrophication of rivers, lakes, etc. Therefore, rust preventive agents not containing the above-mentioned inorganic salts have been proposed (for example, Patent Document 1 and Patent Document 2). [0003] However, the composition proposed in the above-mentioned Patent Document 1 is a rust preventive agent targeting only iron, and it cannot be used because corrosion occurs if it is a non-ferrous metal. In addition, the composition propos...

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Problems solved by technology

[0003] However, the composition proposed in the above-mentioned Patent Document 1 is a rust preventive agent only for iron, and if it is a non-ferrous metal, corrosion occurs, so it cannot be used.

In addition, the composition proposed in the above-mentioned Patent Document 2 contains an alkali metal, which may corrode non-ferrous metals, and rust prevention residues will affect the finish of the appearance or the next step, so it is not suitable for use on the surface of raw materials. Electronic parts whose residues are strictly managed

[0004] In this way, the actual situation is that there are basically no rust inhibitors with low toxicity, high safety, excellent rust resistance to various metals such as iron and non-ferrous metals, and low influence of rust inhibitor residues.

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