Purpose

A novel compound was synthesized by cyclohexylamine, acetophenone and cinnamaldehyde through Mannich reaction in laboratory to use as corrosion inhibitor for steel in acidification process.

Design/methodology/approach

The corrosion and inhibition of 13Cr stainless steel in conventional acidification solution were investigated by electrochemical measurements and soaking experiments. The corrosion appearance was observed with scanning electron microscope on the whole surface of 13Cr stainless steel in 20% HCl solution, and the protection film was confirmed on the surface in presence with inhibitor.

Findings

Results manifested that the inhibitor C23H27NO can effectively inhibit the corrosion reaction by forming an adsorption layer function as a barrier. Polarization curves indicated that the mixed inhibitor can reduce anodic dissolution and cathodic hydrogen evolution reactions simultaneously. The results of impedance measurements indicated that this inhibitor cannot change the corrosion mechanism of 13Cr stainless steel in 20% HCl solution. The results of the study can provide a theoretical basis for the application of 13Cr stainless steel in conventional acidification solutions during oil well acidification construction process.

Originality/value

A novel compound was synthesized by cyclohexylamine, acetophenone and cinnamaldehyde through Mannich reaction in laboratory to use as corrosion inhibitor for steel in acidification process. The corrosion and anti-corrosion mechanism of 13Cr steel in acid solution was proposed.

中文翻译：

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适用于20％HCl溶液中的13Cr不锈钢的新型缓蚀剂

目的

在实验室中通过曼尼希反应，由环己胺，苯乙酮和肉桂醛合成了一种新型化合物，用作酸化过程中钢的缓蚀剂。

设计/方法/方法

通过电化学测量和均热实验研究了13Cr不锈钢在常规酸化溶液中的腐蚀和缓蚀作用。用扫描电子显微镜在20％HCl溶液中的13Cr不锈钢的整个表面上观察到腐蚀现象，并且在存在抑制剂的情况下确认了保护膜。

发现

结果表明，抑制剂C23H27NO通过形成作为阻挡层的吸附层可以有效地抑制腐蚀反应。极化曲线表明，混合抑制剂可同时减少阳极溶解和阴极析氢反应。阻抗测量结果表明，该抑制剂不能改变13Cr不锈钢在20％HCl溶液中的腐蚀机理。研究结果可为油井酸化施工过程中13Cr不锈钢在常规酸化溶液中的应用提供理论依据。

创意/价值

在实验室中通过曼尼希反应，由环己胺，苯乙酮和肉桂醛合成了一种新型化合物，用作酸化过程中钢的缓蚀剂。提出了13Cr钢在酸性溶液中的腐蚀与防腐机理。