Rust-proof treatment process for steel fastener

Abstract

The invention discloses a rust-proof treatment process for a steel fastener. A rust-proof treatment fluid adopted by the process consists of the following components in percentage by weight: 6-8% of sodium silicate, 5-7% of sodium metasilicate, 3-5% of sodium bicarbonate, 1-3% of ammonium citrate, 0.8-1.2% of diethylamine, 0.3-0.5% of octadecyl amine, 0.05-0.07% of fatty alcohol-polyoxyethylene ether, 0.03-0.05% of tween-80, 0.2-0.4% of hydroquinone, 0.15-0.35% of an organic silicon wetting agent, 0.6-0.8% of texanol ester alcohol, 12-14% of alcohol and the balance of water. The treatment process comprises the following steps: firstly, mechanically removing rust for the steel fastener, then washing the steel fastener with clear water, removing oil by alkali wash water, flushing with clear water; and then, soaking the steel fastener in the treatment fluid with the components, flushing the steel fastener with clear water and drying the steel fastener, wherein the temperature of the treatment fluid is 25-45 DEG C, the pH value is 2.0-3.0, and the treatment time is 10-20 minutes.

Description

technical field [0001] The invention relates to the technical field of surface treatment, in particular to an antirust treatment process for steel fasteners. Background technique [0002] Anti-rust oil is composed of oil-soluble corrosion inhibitor, base oil and auxiliary additives. According to performance and use, it can be divided into fingerprint removal type antirust oil, water dilution type antirust oil, solvent dilution type antirust oil, antirust and lubrication dual-purpose oil, sealed antirust oil, replacement type antirust oil, thin layer oil , antirust grease and vapor phase antirust oil, etc. Corrosion inhibitors commonly used in antirust oils are alkaline earth metal salts of fatty acids or naphthenic acids, lead naphthenate, zinc naphthenate, sodium petroleum sulfonate, barium petroleum sulfonate, calcium petroleum sulfonate, tallow trioleate Amine, rosin amine, sorbitan monooleate, polyethylene glycol dioleate, polyethylene glycol distearate, oleoyl sarcosi...

AI Technical Summary

Problems solved by technology

[0004] At present, due to environmental restrictions, many oil-soluble antirust agents commonly used in the past have been restricted in use, such as barium sulfonate, which has a better antirust effect on ferrous metals, etc. Barium ions are heavy metal ions, and long-term discharge in the environment will cause heavy metals to accumulate. vicious events, so countries all over the world are promoting new additives that do not contain barium or even sulfonate

[0005] The current anti-rust oils in our country basically use gasoline, kerosene or machine oil as solvents, and they are all products of oil fractionation. At present, because the aromatic hydrocarbons contained in oil cannot be extracted, gasoline, kerosene and machine oil All oils contain aromatic hydrocarbons. Using gasoline and kerosene as solvent oil has a low flash point and is easy to catch fire. Second, it pollutes the environment and is harmful to human health.