Investigation in effect of different culture medium on the anti-corrosive performance of bacterial biopolymer

According to enormous defects of corrosion, ruining near 1-5% GNP, many methods are applied to reduce these disadvantages. One of the novelist methods to encounter this destructive phenomenon is using environmental-friendly bacterial biopolymer coating. The effective anticorrosive ability of this coating has been proved. It is shown that changing the biopolymer production medium can affect this property. In this paper, Chryseobacterium Indologenes MUT.2 made biopolymer has been studied under different culture medium constituents. The biopolymers produced under different conditions, visually tested in VNSS solution and salt spray test. The samples with more anti corrosive property have been analyzed in more accurate EIS test to achieve the most resistant one. It has been showed that the biopolymer produced in molasses and sodium nitrite, as carbon and nitrogen sources respectively, has the highest anti corrosive ability. (C) 2017 Taiwan Institute of Chemical Engineers. Published by Elsevier B.V. All rights reserved.