Research Status of Green Efficient Corrosion Inhibitors

Corrosion inhibitors are widely used because they have the characteristics of trace and high efficiency， can prevent metal corrosion，while maintaining the physical and mechanical properties of the metal unchanged， and easy to use.Traditional metal corrosion inhibitors have poor biodegradability， toxicity and are easy to cause environmental pollution.Based on the concepts of environmental protection， sustainable development and green chemistry， the use of traditional metal corrosion inhibitors has been severely restricted， and the research on corrosion inhibitors is gradually shifting to environmentally friendly substances.In this paper， green environmental protection corrosion inhibitors were divided into single system corrosion inhibitors and compound system corrosion inhibitors， and the research progress in recent years were reviewed.Furthermore， the advantages and disadvantages of various types of corrosion inhibitors were classified and summarized， and the current status and research direction of environmentally friendly corrosion inhibitors were prospected.