Electrochemical and theoretical assessment of the effect of two biocides on the corrosion of petroleum steel in sulfur‐polluted Black Sea water

Abstract

Although the inhibitory effects of different biocides continue to gain everincreasing importance, the corrosion inhibition of petroleum steel in the Black Sea water by such compounds remains largely uncharacterized. Thus, to study the effect of sulfate-reducing bacteria, corrosion parameters in oxygen-free medium contaminated with sulfur have been determined. The variation of corrosion rates with the addition of two biocides, glutaraldehyde (GA) and ammonium chloride (AC), has been determined by using Tafel extrapolation and linear polarization methods in sulfur-polluted seawater, both with and without biocides. Overall, this experimental work, also corroborated by theoretical data, reveals that some concentrations of GA and AC act as effective biocides in sulfur-polluted medium. K E Y W O R D S ammonium chloride, biocide, DFT, glutaraldehyde, petroleum steel, SRB

In Vitro and In Vivo Evaluation of the Toxic Effects of Dodecylguanidine Hydrochloride

“…First, we performed cytotoxicity assays for eight guanidine-based chemicals, and then conducted acute inhalation toxicity studies for DGH, which was found to be the most toxic compound among them. DGH has been used as a guanidine-type cationic surfactant and antimicrobial biocide as well as a treatment material for paper that contacts with food, paint additives, and anti-bacterial treatment material of diapers [ 28 ]. Although toxicological information of DGH is limited, the Reregistration Eligibility Decision (RED) document for dodecylguanidine acetate (also known as dodine), published by the US Environmental Protection Agency, described that DGH and dodine are salts of the same chemical, have similar dissociation pattern, and are bioequivalent and toxicologically identical [ 29 ].…”