Selman DİNÇER, Abdurrahman ASAN, Tülin KIYAK, Melike KABASAKALOĞLU

Korozyon inhibitörü olarak benzotriazol

Bu çalışmada %70 Cu %30 Zn içeren pirinç alaşımının O, 1 M NaCl çözeltisi içindeki korozyonu üzerine Benzotriazol(BTA)'ün etkisi elektrokimyasal polarizasyon ve çözelti analizleri ile incelenmiştir. Karşılaştırma amacıyla bakır ve çinko elektrotlarla da elektrokimyasal polarizasyon eğrileri elde edilmiştir. BTA içeren O,1 M NaCl çözeltilerinde bakır ve pirinç benzer elektrokimyasal özellik göstermiştir.BTA pirinçte iki ayrı potansiyel bölgesinde iki farklı şekilde etkili olur.-1,0 V ile 0,0 V arası birinci bölgede elektron transferi ile Cu-BTA filmi meydana gelir. 0,0 V ile 0,8 V aralığındaki ikinci bölgede bu film bakır oksitlerinin ve CuCl filmi üzerinde pasifliği sağlar.

Benzotriazole as corrosion inhibitor

Corrosion inhibition of benzotriazole (BTA) for 70/30 brass in 0.1 M NaCl has been evaluated by means of electrochemical polarization and solution analysis.For comparision electrochemical polarization curves were also obtained with zinc and copper electrode. Brass and copper have the same electrochemical properties in BTA containing 0,1M NaCl solution. The anodic responses of the brass in 0.1 M. NaCl containing benzotriazole displays two potential regions. At the first anodic region between -1.0 and 0.0V (SCE), benzotriazole addition Cu(I)BTA film is formed by electron transfer. At the second region between 0.0 V and 0,8 V (SCE) copper is oxidized to Cu(I) oxide and Cu(II) hydroxide with the formation of CuCl film. Insoluble Cu(I)BTA film complex is also formed on these oxide/ hydroxide films.

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