학술논문
Effect of benzotriazole on electrochemical and corrosion behaviour of type 304 stainless steel in 2M sulphuric acid solution
Document Type
Article
Source
Corrosion Engineering, Science & Technology; January 1996, Vol. 31 Issue: 4 p305-308, 4p
Subject
Language
ISSN
1478422X; 17432782
Abstract
The effect of benzotriazole (C6H3N5) as a corrosion inhibitor for type 304 stainless steel in 2M H2SO4has been studied using weight loss experiments, anodic and cathodic potentiostatic measurements, atomic emission spectrometry, and optical and scanning electron microscopy. Benzotriazole acted as a corrosion inhibitor over the entire range of potentials studied, from −625 to + 1250 m V with respect to a saturated calomel electrode, and did not promote selective alloy dissolution. The protective film was stable and adherent and obeyed the Langmuir isotherm, while values of the equilibrium adsorption constant suggested chemical adsorption. The maximum coverage obtained was 0·97 for stirred solutions and 1·0 for unstirred solutions, these values being associated with partial dissolution and lack of dissolution of inclusions respectively.