Abstract
In this work, corrosion inhibition of X80 steel caused by Cetylpyridinium Chloride (CPC) in the presence of sulfate-reducing bacteria (SRB) was studied. The results showed that SRB accelerated the steel corrosion, whereas CPC had a good antibacterial activity against SRB corrosion. The growth of SRB was significantly inhibited with CPC concentration 10 mg L–1. The addition of 80 mg L–1 reduced the corrosion rate by 80 % in the presence of SRB. Molecular dynamics simulation and adsorption isotherm calculation showed that CPC can be adsorbed on the steel surface to form a protective film to protect steel form corrosion.
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