|
|
INVESTIGATION ON INHIBITING MECHANISMOF SDS FOR LOCALIZED CORROSION OF STAINLESSSTEEL BY SIMULATED OCCLUDED CELL |
Chunchun Xv;Xiaomei Wu;Youping Liu |
北京化工大学材料科学与工程学院 |
|
|
Abstract Simulated occluded corrosion cell(OCC) was used to stud y the changes of chemical state within the OCC of 304 stainless steel in neutra l solution of 0.5 mol/L NaCl containing various SDS(sodium dodecyl sulphate) ion concentration at 50℃.Anodic polarizing occluded specimen to simulate reaction current between outer and inter of OCC.It was found that,when C12H25 SO-4 anion added into the bulk solution,it migrated into OCC,and the migrati on quantity increased with the concentration and the time,the migration rate dec reased with the length of the time.C12H25SO-4 was in competition with Cl- on migration,It can retard the migration of Cl- effectively above a certain concentration,The higher the concentration,the more the efficiency.C 12H25SO-4 can not retard pH fall but fell multiples of Cl- enric hment effectively above a certain concentration.SDS was anioning inhibitor,E b and Ep were shifted towards positive potentials by the addition of C 12H25SO-4,indicating suppression of pit propagation.
|
Received: 22 November 2000
|
|
Corresponding Authors:
Chunchun Xv
E-mail: chunchunxu@163.com
|
[1]ZuoJingyi,JinZhiqiang.Investigationofchemicalchangeswithincrevicesof1Cr18Ni9TiausteniticstainlesssteelinCl-+NO-3orNO-2 solutions[A ].InternationalCongressonMetallicCorrosion[C],1984,4:344-349 [2]TurnbullAA .Thesolutioncompositionandelectrodepotentialinpits,crevicesandcracks[J].Corros.Sci.,1983,23(8):833-870 [3]ZuoJingyi,JinZhiqiang,ZhangShuxia,XuYubao,WangGuangyao.Investigationofchemicalandelectrochemicalchangeswithincorrosioncrevicesandcracksof18-8stainlesssteelinchloridesolution[A].InternationalCongressonMetallicCorrosion[C],1984,4:336-343 [4]ZuoJingyi,JinZhiqiang.Investigationofchemicalandelectrochemi calchangeswithincorrosioncracks[J].ChemicalEngineeringJour nal,1982,4:291-301(左景伊,金志强.腐蚀裂缝内化学和电化学状态之探索[J].化工学报,1982,4:291-301) [5]ZuoJY ,JinZQ ,SunRH ,etal.AcceleratingeffectandcriticalpHvalueofoccludedcellcorrosionwithinpits,crevicesors.c.cracks[J].Corros.Sci.,1988,44(8):539-543 [6]FujiokaE ,NishiharaH ,AramakiK .TheinhibitionofpitnucleationandgrowthonthepassivesurfaceofironinaboratebuffersolutioncontainingCl- byoxidizinginhibitors[J].Corros.Sci.,1996,38(11):1915-1933 |
No Suggested Reading articles found! |
|
|
Viewed |
|
|
|
Full text
|
|
|
|
|
Abstract
|
|
|
|
|
Cited |
|
|
|
|
|
Shared |
|
|
|
|
|
Discussed |
|
|
|
|