Sorbitol and maltitol inhibitor and preparation method thereof

Abstract

The invention provides a production method of sorbitol and maltitol inhibitor. The sorbitol and maltitol inhibitor comprises, by weight percent, 2-3% of sodium molybdate, 2-3% of alkyl benzimidazole, 6-7% of sodium benzoate, and the balance of sorbitol and maltitol. The ratio of the sorbitol to the maltitol in the balance is 1:1. The production method includes mixing the maltitol and the sorbitol, heating to 70 DEG C, mixing well, adding the alkyl benzimidazole, continuing mixing, heating to 90 DEG C, then heating to 110 DEG C, continuing mixing for 2 hours, chelating and combining, allowing for cooling to 100 DEG C, mixing, adding active carbon for discoloration, mixing again, allowing for cooling to below 70 DEG C, and cooling and packing. The sorbitol and maltitol inhibitor is applicable to various medium corrosion environments, is applicable to black and nonferrous metals, and is water-soluble, non-corrosive, nonflammable and low-toxicity. The production method is free of emission of waste gas, waste water and waste residue, is low in noise and low in energy consumption and is widely applicable.

Description

technical field [0001] The invention relates to a mechanical surface protection engineering technology, a metal surface antirust agent and a manufacturing method thereof, in particular to a corrosion inhibitor made of sorbitol and maltitol as base materials and a preparation method thereof. Background technique [0002] Corrosion inhibitor, English name: anti-corrosive; corrosion inhibitor, is a substance that can prevent or reduce the corrosion of metals in environmental media at low concentrations. Corrosion inhibitors are also known as corrosion inhibitors, chemical inhibitors, rust inhibitors or corrosion inhibitors. Corrosion inhibitor protection technology has developed into an important anti-corrosion technology, widely used in petroleum, chemical industry, metallurgy, machinery manufacturing, transportation and power and other departments. In neutral media, such as boiler water, circulating cooling water equipment, and pipeline corrosion inhibitors, 2-hydroxyphospho...

AI Technical Summary

Problems solved by technology

In neutral media, such as boiler water, circulating cooling water equipment, and pipeline corrosion inhibitors, 2-hydroxyphosphonoacetic acid (HPAA) and organic phosphate are generally used as the mainstream corrosion inhibitors. This corrosion inhibitor, It is non-toxic or low-toxic, and has a good protective effect on a variety of metals. However, it has a single purpose and can only be used in a medium corrosion environment

In the fields of metal smelting, metal processing and manufacturing, corrosion inhibitors such as chromate, nitrite, and inorganic phosphate are still used as mainstream corrosion inhibitors. The finished products of such corrosion inhibitors also have a single purpose and are not dedicated. For ferrous metals, it is only used for non-ferrous metals, and it is suitable for corrosive substances in a single environmental medium, such as neutral media, such as boiler water and circulating cooling water equipment pipelines, or acidic media, such as descaling hydrochloric acid and Acid dipping solution for rust removal of plated parts before electroplating, etc., not suitable for corrosive substances in various environmental media

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