Self-repairing corrosion inhibitor of Q235 steel and preparing method thereof

Abstract

The invention discloses a pH-sensitive Q235 steel corrosion inhibitor with the self-healing ability. The corrosion inhibitor is 8-HQ embedded HNTs, the outer portion is wrapped with a polyelectrolyte,and the polyelectrolyte selects PSS and PAH. When the Q235 steel has the cathode reaction in the corrosion process, the local pH value is changed, the 8-HQ is released to form a complex compound withiron ions, and absorbing is carried out on the surface of the Q235 steel so as to overcome the defect.

Description

technical field [0001] The invention relates to a corrosion inhibitor, in particular to a pH-sensitive Q235 steel corrosion inhibitor with self-healing ability and a preparation method thereof, belonging to the technical field of metal anticorrosion. Background technique [0002] Corrosion protection of metals and their alloys is one of the most important issues in industry and everyday life, as corrosion can lead to material failure, equipment shutdown, resource waste, product loss or contamination, reduced productivity and increased maintenance costs. Although various protective coatings for metals have been studied in the past few years, once corrosion substances accumulate in the protective layer, they will penetrate into the metal surface, causing continuous corrosion to occur. Therefore, in order to achieve long-term protection of metal surfaces with active healing ability, self-healing coatings have attracted extensive attention in recent years. [0003] One approach...

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Problems solved by technology

[0005] Many existing corrosion inhibitors have certain defects, such as high toxicity and carcinogenicity, which will seriously endang

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