Neutral rust removal liquid and rust removal method

Abstract

The invention relates to the technical field of steel rust removal, and particularly discloses neutral rust removal liquid and a rust removal method. The neutral rust removal liquid comprises 10-20 parts of organic acid; 5 to 12 parts of disodium ethylene diamine tetraacetate; 0.2 to 2 parts of lauramide propyl amine oxide; 0.2 to 2 parts of stearyl dimethyl amine oxide; 0.2 to 2 parts of lauryl hydroxypropyl sulphobetaine; 1 to 4 parts of sodium cetostearyl sulfate; 1 to 4 parts of molybdate; 0.5 to 3 parts of fatty alcohol polyoxyalkyl ether; 2 to 12 parts of a pH regulator; 10-20 parts of an alcohol solvent; and 40-55 parts of water. The rust removal method comprises the following steps: preparing a rust removal solution: preparing the rust removal solution from the neutral rust removal solution and water; soaking for rust removal, wherein the workpiece is soaked in a rust removal solution for rust removal; workpiece cleaning is conducted, specifically, the workpiece subjected to soaking rust removal is cleaned; and workpiece drying treatment is conducted, specifically, the cleaned workpiece is dried. The steel rust removal effect can be improved, and the re-rusting phenomenon is relieved.

Description

technical field [0001] The application relates to the field of iron and steel derusting, more specifically, it relates to a neutral derusting solution and a derusting method. Background technique [0002] The application of steel materials has penetrated into all walks of life, which has increased the demand for steel materials. However, steel materials are prone to rust when exposed to the air. On the one hand, corrosion may cause direct scrapping of steel materials, resulting in a large amount of waste of raw materials and serious economic losses. On the other hand, corrosion seriously affects the normal use of steel materials. It has a great impact on the mechanical properties of steel products and buryes safety hazards for the normal use of steel products. [0003] Rust remover is a treatment liquid used to remove rust spots on steel materials. Traditional rust removal solutions usually use strong acids. This type of strong acid type rust removal solution has high acid...

AI Technical Summary

Problems solved by technology

However, there are the following problems in the strong acid type derusting liquid: the first, excessive corrosion is very easy to occur, causing damage to the surface of the steel material; the second, strong acid belongs to dangerous chemicals, and the operation in the process of preparing the derusting liquid is loaded down with trivial details, The safety factor is low; third, the acidity of strong acid is high, it is easy to produce acid mist, and it is easy to cause environmental pollution; fourth, after the strong acid type derusting liquid treats the corroded steel material, it needs to clean or neutralize the steel material many times. There are relatively many processing procedures; fifth, after the strong acid type derusting liquid derusts the iron and steel materials, it is very easy to return to the rust phenomenon, and even rusts again within a few hours or a few days

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