BIOFOULING EFFECT ON CORRODING BEHAVIOUR OF BRASS IN MALLIPATTINAM SEAWATER
Chidirala Suresh and P. Mohamed Sirajudeen*
Biofouling studies in the Mallipattinam seawater (0.28060 N, 79.31700E), south eastern Bay of Bengal, Thanjavur,
India, were carried out for six months (January2017-June 2017) to understand the biofouling behaviours of
organisms. The fouling organisms of Mallipattinam seawater(MSW)compress of algae(green and red), barnacles,
molluscs, polychaetesand worms. The periodic attachment and aggregate of fouling organisms growth on brass
over a period of six months have been inspected in the MSW. Assemblages of algae stimulate corrosion on brass.
Barnacles and Mollusks cause pitting corrosion underneath their attachment site. Polychaetesexhibitedon last
month coupons however, flatworms showed significant season-wise in settlement. Presence of oysters on coupons
was enumerated in significant numbers during the present study. In general, the assemblages of biofouling
organisms on brass surface over a period of exposure cause the corrosion rate. The extent of origin experienced by
brass is highlighted in terms of change in mechanical properties and the surface characteristics of the material.
Keywords: Fouling organisms, biofouling, assemblage, south eastern Bay of Bengal, Mallipattinam Seawater (MSW), corrosion rate.
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