Abstract
Acid corrosion is a problem pertaining to corrosion that involves an acid solution. It is important to treat metal to preserve its integrity. Thus, acids are utilized to clean and treat metal surfaces. In return, this may lead to over-etching and metal degradation. Corrosion inhibitors were introduced as a solution for the issue. However, there are some problems associated with the usage of conventional corrosion inhibitors. Traces of nitrites and chromates that are present in the inhibitors may lead to serious health and environmental issues. As a solution, organic green corrosion inhibitors have been studied to replace the conventional corrosion inhibitors. These inhibitor molecules form a protective layer on top of the metal surface to suppress metal dissolution when added to the acid solution. This process prevents direct contact between the metal surfaces and the acid environment. This study explores the usage of natural resources and biomass wastes as the basis for organic green corrosion inhibitors. This study also provides some suggestions for new biomass wastes that can be studied as new organic corrosion inhibitors, and it is aimed at opening the perspective of researchers on exploring new organic inhibitors by using natural resources and biomass wastes.
Highlights
Srivastava [1] and Zaher et al [2] highlighted the profuse usage of mild steel in the industry, especially in the fabrication of machines and structural foundations
This was corroborated by Popoola [11], who concluded that approximately 80% of organic green corrosion inhibitors fall in this category
The authors compared the images of metal surfaces immersed in the acid solution with and without the Equisatum hyemale extracts
Summary
Srivastava [1] and Zaher et al [2] highlighted the profuse usage of mild steel in the industry, especially in the fabrication of machines and structural foundations. Corrosion has always been a challenge faced by the industry players This is due to the usage of acid as the cleaning medium for mild steel, as explained by Zaher et al [2] and Sulaiman et al [3]. This was corroborated by Dehghani et al [4]. The author mentioned that, it cannot be avoided, it can be slowed down by deploying appropriate corrosion protection strategies In this context, this study initiated a review of the recent literature concerning corrosion inhibitors in an acidic environment. The conclusion and summary are presented in the Section 11
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