Goncharova Olga A, Luchkin Andrey Yu, Andreev Nickolay N, Grafov Oleg Yu, Makarova Olga S, Kuznetsov Ilya A, Vesely Sergey S
Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, 119071 Moscow, Russia.
Materials (Basel). 2023 May 11;16(10):3679. doi: 10.3390/ma16103679.
Chamber protection is a promising and quickly developing method of vapor-phase protection of metals against atmospheric corrosion by inhibitors. It was shown that chamber treatment with 2-ethylhexanoic acid (EHA) efficiently inhibits the initiation of zinc corrosion. The optimum conditions (temperature and duration) of zinc treatment with vapors of this compound were determined. If these conditions are met, adsorption films of EHA with thicknesses up to 100 nm are formed on the metal surface. It was found that their protective properties increase during the first day as zinc is exposed to air after chamber treatment. The anticorrosive action of adsorption films is due both to the surface being shielded from the corrosive environment and to the inhibition of corrosion processes on the active surface of the metal. Corrosion inhibition was caused by the ability of EHA to convert zinc to the passive state and inhibit its local anionic depassivation.
气相保护是一种很有前景且发展迅速的利用缓蚀剂对金属进行气相保护以防止大气腐蚀的方法。结果表明，用2-乙基己酸（EHA）进行气相处理能有效抑制锌腐蚀的起始。确定了用该化合物蒸汽处理锌的最佳条件（温度和持续时间）。如果满足这些条件，在金属表面会形成厚度达100 nm的EHA吸附膜。研究发现，在气相处理后锌暴露于空气中的第一天，这些吸附膜的保护性能会增强。吸附膜的防腐作用既归因于其对金属表面免受腐蚀环境的屏蔽，也归因于对金属活性表面腐蚀过程的抑制。缓蚀作用是由EHA将锌转化为钝态并抑制其局部阴离子去钝化的能力引起的。
