cpomaemКоррозия: защита материалов и методы исследованийTitle in englishИФХЭ РАН10.61852/2949-3412-2025-3-2-70-79cpomaem-99Research ArticleСтатьиВлияние добавок бензоата натрия на защитные свойства медного сплава МНЖ 5-1 в водных хлоридных растворахThe effect of sodium benzoate additives on the protective properties of MNZh-5-1 copper alloy in aqueous chloride solutionsАгафонкинаМ. О.AgafonkinaM. O.

119071, Москва, Ленинский проспект, д. 31, корп. 4

Leninsky prospect, 31-4, 119071 Moscow

agafonkina@inbox.ruАндрееваН. П.AndreevaN. P.

119071, Москва, Ленинский проспект, д. 31, корп. 4

Leninsky prospect, 31-4, 119071 Moscow

Федеральное государственное бюджетное учреждение науки Институт физической химии и электрохимии им. А.Н. Фрумкина Российской академии наукРоссияFrumkin Institute of Physical Chemistry and Electrochemistry Russian Academy of SciencesRussian Federation202513072025027079Copyright © Агафонкина М.О., Андреева Н.П., 20252025Агафонкина М.О., Андреева Н.П.Agafonkina M.O., Andreeva N.P.This work is licensed under a Creative Commons Attribution 4.0 License.https://www.cpmrm.ru/jour/article/view/99

В работе рассмотрено влияние добавок бензоата натрия (БН) к известным ингибиторам коррозии меди – 1,2,3-бензотриазолу (БТА) и лаурату натрия (ЛН) в нейтральных хлоридных растворах. Показано, что добавление БН к этим соединениям повышает защитные свойства БТА и ЛН на медном сплаве МНЖ5-1. Из результатов поляризационных измерений следует резкое смещение потенциала локальной депассивации в положительную сторону при совместном применении БТА с БН при их эквимолярном соотношении. По результатам коррозионных испытаний обе изучаемые эквимолярные композиции с БН защищают медный сплав от коррозии в 3%-ном растворе хлорида натрия.

The effect of sodium benzoate (BS) additives on known copper corrosion inhibitors 1,2,3-benzotriazole (BTA) and sodium laurate (LS) in neutral chloride solutions is considered. It has been shown that the addition of BTA to these compounds increases the protective properties of BTA and LS on the MNZh-5-1 copper alloy. According to polarization measurements, there is a sharp shift in the potential of local depassivation in the case of combined use of BTA with BS at their equimolar ratio. According to the results of corrosion tests, both studied equimolar compositions with BS protect the copper alloy from corrosion in a 3% NaCl solution.

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The authors declare that there are no conflicts of interest present.