4. Experimental Details and Strategies to Control Corrosion

This chapter is divided into three parts. First two parts discuss about experimental details related to experiments which may be required to do in investigation on MIC. First of these is microbiology work, e.g., isolation of bacteria from natural resources, studying the growth cycle of bacteria, and biofilm characterization, and second of these is related to investigating corrosion due to bacteria. In this later case, details have been discussed about surface preparation of original and corroded metal samples, preparation of test solution, corrosion estimation test, e.g., immersion test, electrochemical test, analytical tests, e.g., XRD, FTIR, SEM, and ESCA. The third part deals with the strategies to control MIC. This part discusses about corrosion-causing bacteria, e.g., sulfate-reducing bacteria (SRB), iron-oxidizing bacteria (IOB), metal-reducing bacteria, and acid-producing bacteria, and the details involved which are responsible for MIC. Afterward, in this chapter, details about the bacteria which mitigate MIC or corrosion have been dealt. This part deals with several different ways in which microbial induced corrosion inhibition can be practiced using bacteria. Thus, microbial inhibition has been discussed (i) by removal of oxygen, (ii) by inhibiting growth of corrosion-causing bacteria through production of antimicrobials, and (iii) by using microbes which produce protective layers.