Plant Polymer Research, National Center for Agricultural Utilization Research, Agricultural Research Service, United States Department of Agriculture, 1815 North University Street, Peoria, IL 61604, USA.
Biotechnol Lett. 2011 Jun;33(6):1093-100. doi: 10.1007/s10529-011-0539-2. Epub 2011 Feb 3.
Corrosion of metals is a serious and challenging problem faced worldwide by industry. Purified Leuconostoc mesenteroides exopolysaccharide (EPS) coatings, cast from aqueous solution, inhibited the corrosion of low-carbon steel as determined by electrochemical impedance spectroscopy (EIS). There were two different corrosion behaviors exhibited when EPS films from different strains were cast onto the steel. One EPS coating reacted immediately with the steel substrate to form an iron (III) oxide layer ("rust") during the drying process while another did not. The samples that did not flash corrode had higher corrosion inhibition and formed an iron (II) passivation layer during EIS testing that persisted after the cells were disassembled. Corrosion inhibition was strain-specific as polysaccharides with similar structure did not have the same corrosion potential.
金属腐蚀是全球工业面临的一个严重且具有挑战性的问题。从水溶液中浇铸的纯化肠膜明串珠菌胞外多糖 (EPS) 涂层通过电化学阻抗谱 (EIS) 确定可抑制低碳钢的腐蚀。当不同菌株的 EPS 薄膜浇铸在钢上时，表现出两种不同的腐蚀行为。一种 EPS 涂层在干燥过程中立即与钢基底反应，形成氧化铁层（“铁锈”），而另一种则没有。没有闪蚀的样品具有更高的腐蚀抑制作用，并在 EIS 测试期间形成铁 (II) 钝化层，在细胞分解后仍然存在。腐蚀抑制作用具有菌株特异性，因为具有相似结构的多糖没有相同的腐蚀电位。
