Abstract
Bio-fouling is the attachment and accumulation of an organism or micro-organism to a material. Bio-fouling is one of the causes of declining performance and quality in a system of structures, especially structures that have a direct relationship with the waters where the bio-fouling live and move. The research was conducting using a simple circuit that represents Impressed Current Anti Fouling (ICAF) system which is generally located on the cooling of the ship against micro-fouling or bacteria. Species of bacteria (Pseudomonas fluorescens) in the marine environment was used as an object. The bacteria were introduced into the reactor containing the cathode and anode of this simple system, with inputs of experimental time variation of 3, 5 and 7 minutes and electrical current variation of 0.1, 0.3, and 0.5 Ampere. The determination of bacteria population was conducted using standard plate count methods. The results showed that ICAF system can reduce the bacteria populations. The largest percentage of Pseudomonas fluorescens reduction was 99.9%, while the smallest percentage showed 98.5% percentage. In conclusion, the simple of ICAF system can be used to prevent appearance of micro-fouling in marine environment.
Highlights
The most commonly material in the offshore technology is definitely from metal
Salinity of 35‰ is the salinity in the ocean of medium depths, where in the microorganism commonly found at this depth, including bacteria
Reduction of Pseudomonas fluorescens population was higher during the time increased
Summary
The most commonly material in the offshore technology is definitely from metal. The problem with the oxidation of a metal material lies in almost every element on earth, such as water or air. Especially seawater on an offshore structure is inevitable. The sea water has a rapid corrosion rate, caused by salinity present in seawater or solid and gaseous solutes, such as inorganic salts, dissolved gases and organic compounds of living organisms. Sea water can dissolve other substances in large quantities than other liquids. The anti-corrosion system is needed by all structures which directly contact to sea water
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