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Title: Design of environmentally-acceptable corrosion inhibitors
Author: Smith, G. A. W.
Awarding Body: University of Aberdeen
Current Institution: University of Aberdeen
Date of Award: 1995
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The first class of compounds investigated was the benzimidazoles. They are widely used in the pharmaceutical industry and have a low toxicity towards human and animal life, therefore, they are potentially suitable for use in a marine environment. These compounds have been reported to have some, although limited, use as corrosion inhibitors. With the aid of a molecular modelling package several benzimidazole molecules were functionalised to resemble the known inhibitor disodium sebacate. Satisfactory corrosion inhibiting properties were found for these compounds. The second compound to be investigated was Westvaco Diacid. It is a biodegradable, non-toxic, renewable natural resource, derived from the paper pulping process. It was found that by chemically altering its structure its corrosion inhibiting properties could be increased. The third source of potential corrosion inhibitor which was investigated was rapeseed oil. Again it is a non-toxic, renewable natural resource, consisting of the triglycerides of a mixture of fatty acids. Rapeseed oil was chemically modified, the products were not as potent corrosion inhibitors for mild steel as the previous classes of compound that were described. The corrosion inhibiting properties of the products which had been synthesised were tested by the weight loss method, on mild steel coupons, over a twenty day period, in distilled water and 10-3M potassium chloride solution. Examples of each class of compound showed no bactericidal activity when tested against sulphate reducing bacteria (SRB's). With the exception of the rapeseed oil derivative, all of the above compounds were tested for their corrosion inhibiting properties at high temperatures (80oC). Again the corrosion inhibiting properties were determined by the weight loss method, on mild steel coupons, in both distilled water and 10-3M potassium chloride solution.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available