Pyrazole heterocycle-containing amino acid Schiff base sodium salts, synthesis method thereof and application of the salts as metal corrosion inhibitors

The invention discloses pyrazole heterocycle-containing amino acid Schiff base sodium salts structure formulae of which are shown in the specification. The invention further provides a synthesis method of the eight pyrazole heterocycle-containing amino acid Schiff base sodium salts and application of the eight pyrazole heterocycle-containing amino acid Schiff base sodium salts in the aspect of magnesium alloy corrosion inhibition. AZ31B Mg alloy samples are soaked in the eight solutions respectively for 24 h and then film is formed, and an electrochemical test is carried out in a 0.05 wt.% NaCl medium, proving that the corrosion prevention efficiency under the optimal condition reaches up to 98.2%. The eight pyrazole heterocycle-containing amino acid Schiff base sodium salts have the advantages of low synthesis cost, simple synthesis process, mild reaction conditions, simple post-treatment and the like, and are efficient magnesium alloy corrosion inhibitors. 本发明公开了一类含吡唑杂环的氨基酸希夫碱钠盐，其结构式分别如下所示：本发明还提供了上述八种含吡唑杂环的