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Purpose The paper aims to describe an experimental study into the effects of an alkyl amine-based inhibitor on the corrosion behaviour of 1018 carbon steel in sea water. This corrosion inhibitor on carbon steel's adsorption equilibrium was also investigated. The corrosion inhibitor was determined based on parameters such as inhibitor concentration, temperature, stirring speed, and pH. Using Fourier transform infrared spectroscopy, scanning electron microscopy, and energy dispersive spectrometry, a surface examination of the steel substrate before and after applying different doses of inhibitor was carried out. To provide a monolayer of protection on the carbon steel surface, this adsorption capacity was determined and fitted Langmuir and Shawabkeh, Tutunji isotherms, and was found to require a minimum requirement of 1. 08 mg of corrosion inhibitor, according to this adsorption capacity. Increased inhibitor concentration and solution pH improved the inhibition kinetics. The results of anodic and cathodic Tafel coefficients, determined by the Butler'Volmer Equation, were an average of 0. 8 and 0. 2, respectively, according to the Butler's Equation's Polarization results. Implications of the tested inhibitor's effectiveness More inhibitor concentrations can be investigated in order to get more detailed conclusions on the drug's effectiveness. Practical implications The effect of an alkyl amine-based inhibitor on the corrosion inhibition characteristics of 1018 carbon steel in sea water was determined at a variety of inhibitor concentrations, temperatures, stirring speeds, and pH. Originality/value The new data in this paper is the effect of an alkyl amine-based inhibitor on the corrosion characteristics of 1018 carbon steel in seawater using an autoclave with a flow circulation system.
Source link: https://doi.org/10.1108/acmm-06-2013-1270
Purpose This paper is intended to investigate carbon steel corrosion under wet/dry conditions using electrochemical techniques. For a set period of time, Plain carbon steel specimens were treated with three different inhibitors. During the same period, one group of the specimens was exposed to 60 wet/dry cycles, while a second group was kept continuously immersed in distilled water. However, specimens treated with dicyclohexylamine nitrite and sodium benzoate were better than those treated with sodium dihydrogen orthophosphate during full immersion tests in distilled water. Moreover, the corrosion rates in wet/dry cycling were also elevated in the case of wet/dry cycling, owing to partial immersion, which was a result of the wet and dry cycling process. In addition, wet/dry cycling of steel samples in the laboratory created corrosion rates that were similar to those measured under real outdoor conditions.
Source link: https://doi.org/10.1108/00035590910955522
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