Silicate antirust liquid

Abstract

The invention discloses a silicate antirust liquid. The antirust liquid consists of the following components: 5g / L to 20g / L of silicate, 5ml / L to 20ml / L of H2O2, 8g / L to 20g / L of NaNO3, 25g / L to 45g / L of Zn(NO3)2, 3ml / L to 15ml / L of H2SO4 and the balance of H2O; and in the process of preparation, after all the components in the antirust liquid are completely dissolved, concentrated H2SO4 or NaOH solution is used for regulating the pH value to 1.5 to 3.0. The silicate is one or the combination of sodium silicate and potassium silicate. The silicate antirust liquid can be used as a temporary means of protection when antirust oil cannot be used in the process of the transportation of steel parts, dense protective films can be formed on the surfaces of the processed steel parts, and thereby the corrosion resistance of the steel parts can be enhanced. The invention can remarkably enhances the corrosion resistance of steel parts, so that the rust formation time in a salt fog test can reach more than 50 to 80 hours, which is far longer than the national standard. Since the antirust liquid does not contain barium and even sulphonate, the antirust liquid overcomes the defects of the barium salt processing technique, such as high toxicity and unenvironment-friendliness, and thereby the clean production of steel parts can be implemented in a post-processing process.

Description

technical field [0001] The invention relates to a silicate antirust liquid, which is mainly used as a temporary protection means when the antirust oil cannot be used during the transportation of iron and steel parts, and belongs to the technical field of surface treatment of iron and steel materials. 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 su...

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.

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