涂膜下的丝状腐蚀研究

:20060810:王过之(1939-),男,山西人,大学本科学历,高级工程师,兵器工业59研究所原副总工程师,重庆市涂料涂装专家委员会委员,四川兵工学报!原主编,发表论文数十篇王过之(中国兵器工业第59研究所,重庆,400039)丝状腐蚀是一种线型的涂膜下腐蚀,20世纪60年代在钢质药筒的储存过程中发现,并进行了大量的研究工作本文简要介绍了丝状腐蚀的产生特征机理危害及防治丝状腐蚀;涂膜性能;腐蚀机理1GB/T10123-2001!(eqvISO8044:1999):∀#2060,,,20,,()VanLooStounar25,2,,,:,30,3%FeCl3,,,,:,(),,25,(),,,,25,320061025114mm24mm2:∃,30min,%1%1min,3%CuSO41min,&3%NaCl2min,28min,10,:25,,,,,(2)2∋221010∋11119∋1165,,,,,,,,,,,20,3()∀#,,,,,,,∀V#,,∀#,,∀V#,,,,,,,,∀#,,,不交叉弯绕缩颈1∀#,,∀#,,,,,,;,∀#;,,;,,∀#;,∀#∀#,,∀#∀#,∀#,∀#,3,,,,,∀#4,:4.1445,60%-95%FeCl3,,,:(1)楔形的形成:,,,;,(),,;,,,(2)电解液的凝聚,,,,,,,:(((,:((,,,0.2mV,,::2Fe(2Fe2++4e:O2+2H2O+4e(4(OH)-:2Fe2++4(OH)-(2Fe(OH)2,,2Fe(OH)2+H2O+1/2O2(2Fe(OH)32Fe(OH)3(Fe2O3)H2O+2H2O(3)∀V#形界面的形成,:Fe(OH)2(Fe(OH)3,∀#,∀V#,∀V#,V(),,,,V,22(a)氧浓差的形成(b)丝状腐蚀的折射(c)丝状腐蚀模式4.2∀#,,,:;((,,5200610:,试验情况和试验结果,,:,;,;,;,,,,∀#,,,,,,,,,∀#4.3,,,:,,,pH,,(,),,,∀V#,∀V#,,,,,,,,,2m-10m5,,:,;,,,,6,,,,,,,,,,StudyonFiliformCorrosionundertheCoatingWangGuozhi(No.59instituteofweaponsindustryofChina,Chongqing,400039)AbstractFiliformcorrosionisonetypeoflinearcorrosionunderthecoating.Thiscorrosionhadfoundinthecourseofthestoreofsteelmedicalbarrelsinthe1960∗s.Andcarriedonmanystudies.Thispaperintroducedevolvement,feature,mechanism,harmandpreventionoffiliformcorrosion.Keywordsfiliformcorrosion;performanceofcoating;featureofcorrosion645