Electrochemical corrosion behavior of carbon steel exposed to low concentration agar with and without nutrients

摘要

A novel technique for the study of microbial corrosion in soil is currently being developed. This technique uses microbiologically graded agar to simulate more closely the conditions experienced in soil than is possible with an aqueous solution. Traditionally, most soil based corrosion testing is conducted in the laboratory with solutions made to mimic the chemical composition of soil. This does not take into account the physical structure of soil and resultant electrochemical interactions between the soil, steel and microbes. Agar is commonly used as a solidly setting gelling agent. However, in lower concentrations it forms a sludge like consistency, similar to the consistency of saturated soil.