Preparation method of rust-proof treatment fluid for inner wall of gearbox

Abstract

The invention discloses a preparation method of a rust-proof treatment fluid for an inner wall of a gearbox. The rust-proof treatment fluid consists of the following components in percentage by weight: 8-10% of oxalic acid, 7-9% of triethanolamine, 5-7% of citric acid, 6-8% of petroleum sodium sulfonate, 5.5-6.5% of fatty alcohol-polyoxyethylene ether, 3-5% of ammonium molybdate, 2-4% of sodium benzoate, 1.5-2.5% of sodium hydroxide, 2-4% of industrial alcohol, 1.5-3.5% of ethylene glycol and the balance of water. The preparation method comprises the following steps: 1) adding the industrial alcohol and the ethylene glycol into a container, and then adding the triethanolamine and the fatty alcohol-polyoxyethylene ether, and stirring to uniformly dissolve the triethanolamine and the fatty alcohol-polyoxyethylene ether; and 2) adding an appropriate amount of water into another container, then adding the oxalic acid, the citric acid, the petroleum sodium sulfonate, the ammonium molybdate, the sodium benzoate and the sodium hydroxide in sequence, stirring for 3-5 minutes, stirring for 10-15 minutes after adding the sodium hydroxide, adding a solution prepared in the step 1), then adding the rest water and uniformly stirring.

Description

technical field [0001] The invention relates to the technical field of surface treatment, in particular to a method for preparing an antirust treatment liquid for the inner wall of a gearbox. Background technique [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] 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 ubiquitous phenomenon. [0004] After metal is corroded / rusted, it will change in appearance, color and mechanical properties, for example, causing accidents such as equipment dam...

AI Technical Summary

Problems solved by technology

The gearbox is usually produced by casting process. The size or volume of the parts is relatively large. The material is mainly cast iron. The surface is rough and distributed with many micropores. It is the most prone to rust. Once it is rusted, it is also difficult to deal with.