Corrosion of carbon steel in different biodiesel blends / Mohd Adam Mohd Noor

• Main Author: Mohd Adam , Mohd Noor
• Format: Thesis
• Published: 2015
• Subjects: T Technology (General); TA Engineering (General). Civil engineering (General)
• Online Access: http://studentsrepo.um.edu.my/8345/9/1.pdf; http://studentsrepo.um.edu.my/8345/2/2.pdf; http://studentsrepo.um.edu.my/8345/

Biodiesel is currently in regular use as an alternative fuel over conventional petroleum diesel. However, corrosion of automotive materials is one of the concerns related to biodiesel compatibility issues. The present study aims to investigate the effects of Tertbutylamine and Benzotriazole additive addition on the corrosion behavior of low carbon steel S45C material in different biodiesel blends. Static immersion tests in biodiesel conducted for 1440 hours on solution B0, B20, B50 and B100 without the presence of corrosion inhibitors. Similar testing was carried out with the addition of additive Tertbutylamine and Benzotriazole on solution B20 and B100. At the end of the test, corrosion characteristic was investigated by weight loss measurements, corrosion rate and changes on the exposed metal surface (EDX). Fuels were analyzed by using TAN (total acid number) analyzer and Density measurement in order to investigate the acid concentration and compositional characteristics respectively. Surface morphology was examined by digital photography and scanning electron microscope (SEM). The test result indicates that biodiesel is more corrosive to low carbon steel S45C sample when compared to diesel. The presence of additive Tert-butylamine and Benzotriazole, acts as corrosion inhibitor that retards the corrosion attack and protects the sample from further deteriorating. Both additives improve the corrosion behavior of the low carbon steel S45C sample. However the results indicate that Tert-butylamine acts as the more efficient and effective corrosion inhibitor for low carbon steel S45C operating in biodiesel environment.