التأكل البايولوجي في الهياكل الحديدية لوحدات إنتاج الطاقة الكهربائية في سد حديثة

Abstract

Both fresh water & salt water can sustain thousands of microscopic and macroscopicorganisms, which have been observed to live and grow on the steel structure rules for plants ofelectric power production in sad-haditha. These organisms attach themselves to solid surfacesduring their growth cycle. The accumulation of these organisms causes corrosion directly orindirectly by deterioration of metal. They assimilate ferrous iron ions and precipitate them intotypes of green rusts. Green rust (1) which consists ofFeSO4.7 H2O ,4Fe (OH) 3FeSO4. 4H2O ,Fe (OH)2While green rust (2) consists of[4Fe (OH) 2 (2FeOOH .FeSO4 .4H2O)]The acceleration of corrosion by biological organisms is quite widespread, there has beenrelatively little detailed research concerned with the identification of these species especially inIraq & and this describes the aim & the scope of this work.