循环水系统腐蚀与腐蚀控制-GE公司

1/GEWater-AdvanceCoolingSolution/2012-5-29GEProprietaryGEPower&WaterWater&ProcessTechnologies冷却水产品培训冷却水产品培训3冷却水处理冷却水处理-腐蚀腐蚀2/GEWater-AdvanceCoolingSolution/2012-5-29GEProprietary水处理解决的问题微生物微生物沉积沉积腐蚀腐蚀集结颗粒集结颗粒聚集地聚集地结垢结垢3/GEWater-AdvanceCoolingSolution/2012-5-29GEProprietary腐蚀速率单位milsperyear=1/1000inchperyearmm/y=millimetresperyear1mpy=0.025mm/y1mm/y=40mpy4/GEWater-AdvanceCoolingSolution/2012-5-29GEProprietary经典的电化学反应ElectronFlowCathode阴极氧化反应阴极氧化反应FeoFe2++2e-4Fe(OH)2+O2+2H2O4Fe(OH)3阳极还原反应阳极还原反应中性或碱性水中中性或碱性水中O2+2H2O+4e-4OH-酸性介质中酸性介质中2H++2e-H2(evolved)O2+4H++4e-4H2O5/GEWater-AdvanceCoolingSolution/2012-5-29GEProprietary电化学反应的组成阴极阴极阳极阳极电解质电解质电子流动电子流动6/GEWater-AdvanceCoolingSolution/2012-5-29GEProprietary经典的电化学反应OH-OH-OH-OH-M++O2O2O2O2O2WaterMetale----eeeO2O2O2O2M++M++M++Na+Na+Na+Na+Na+Na+CathodereactionAnodereactionFe0Fe+++e-O2+H2O+2e-2H2OFe+++2OH-Fe(OH)24Fe(OH)2+O2+2H2O4Fe(OH)3M++OH-OH-M++OH-OH-M++OH-OH-7/GEWater-AdvanceCoolingSolution/2012-5-29GEProprietary腐蚀的种类均匀腐蚀或者不均匀腐蚀均匀腐蚀或者不均匀腐蚀宏观宏观微观微观其他其他•微生物腐蚀微生物腐蚀•磨损腐蚀磨损腐蚀