Novel water soluble metal pickling corrosion inhibitor and application thereof

Abstract

The invention relates to the technical field of metal pickling corrosion and prevention, in particular to a novel water soluble metal pickling corrosion inhibitor and application thereof. The corrosion inhibitor comprises water soluble O,O'-bis(substituent)phosphorodithioic ammonium ethanol compounds, namely, O,O'-bis(phenyl)phosphorodithioic-N-ammonium ethanol, O,O'-bis(phenyl)phosphorodithioic-N,N-diethanol amine, O,O'-bis(phenyl)phosphorodithioic-N,N,N-triethanolamine, O,O'-bis(4-tolyl)phosphorodithioic-N-ammonium ethanol, O,O'-bis(4-tolyl)phosphorodithioic-N-N-diethanol amine and the like. The corrosion inhibitor provided by the invention comprises the water soluble O,O'-bis(substituent)phosphorodithioic ammonium ethanol compounds; the water soluble O,O'-bis(substituent)phosphorodithioic ammonium ethanol compounds form an ionic type organic corrosion inhibitor which contains one or more hydrophilic hydroxyl groups; compared with other corrosion inhibitors, the novel water soluble metal pickling corrosion inhibitor is high in water solubility, and does not have the problem of precipitation in an acidic solution.

Description

technical field [0001] The invention relates to the technical field of metal pickling corrosion and protection, in particular to a novel water-soluble metal pickling corrosion inhibitor and application thereof. Background technique [0002] Metal materials are the most widely used engineering materials in modern society, and they play an irreplaceable role in the progress of human civilization, social development, scientific and technological progress, and national defense security. Although metal materials play an extremely important role in various fields of the national economy, their corrosion problems also seriously affect the development of the national economy when metal materials are widely used, from daily life to production practice, from cutting-edge science and technology to national defense In industry, wherever metal materials are used, there are corrosion problems of metal materials to varying degrees. Corrosion of metal materials not only brings huge economi...

AI Technical Summary

Problems solved by technology

[0006] The present invention is aimed at the problems existing in the above-mentioned prior art, that is, the requirements for various aspects of metal pickling corrosion inhibitors are increasing day by day, and the pickling solution that can meet this requirement is still relatively scarce at present, and provides a water-soluble A new type of water-soluble metal pickling corrosion inhibitor with good sex, low cost, high efficiency, stable performance and environmental protection