#TITLE_ALTERNATIVE#

• Main Author: FEBRY (NIM : 13707042); Tim Pembimbing : Dr. Ir. Bambang Widyanto dan Siti Khodijah Chaerun, MUHAMMAD
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/16552
• Institution: Institut Teknologi Bandung

One type of corrosion that can be very harmful to almost all engineering materials is what is called microbiologically influenced corrosion. <br /> <br /> <br /> <br /> <br /> Microbiologically influenced corrosion is believed to account for 20% of the damage caused by corrosion because microbiologically influenced corrosion can occur in almost all environments, such as soil, fresh water, seawater, and <br /> <br /> <br /> <br /> <br /> industries. Type of corrosive microbes used in this research is iron oxidizing bacteria (IOB). They are Comamonas testosteroni (isolated from AMD of Pertamina <br /> <br /> <br /> <br /> <br /> Geotermal, Kamojang) and consortium Alicyclobacillus ferrooxidans dan Aspergillus sp. (isolated from west block area of PT. INCO, Sulawesi). Experiment conducted with API 5L X52 as specimen and three parameters: time (two and four weeks), microbes (Comamonas testosteroni and consortium Alicyclobacillus ferrooxidans and Aspergillus sp.), and the presence of biofilm of Pseudomonas fulva strain SKCSH-05. In this research, corrosion indicators observed are weight loss, element or compound contained in corrosion product, and damage morphology of the surface. Damage morphology observed with SEM. <br /> <br /> <br /> <br /> <br /> The result of research showed that the biggest and smallest amount of weight loss happened on specimen exposed for two weeks and corroded by consortium Alicyclobacillus ferrooxidans and Aspergillus sp.. The biggest amount <br /> <br /> <br /> <br /> <br /> of weight loss (10.1065 mg/cm2) happened on specimen protected by biofilm and the smallest amount of weight loss (0.085 mg/cm2) happened on specimen without protective biofilm. Damage morphology observed with SEM showed <br /> <br /> <br /> <br /> <br /> pitting corrosion on the surface caused by microbial activities.