金属的典型腐蚀形貌

3420068EQUIPMENTENVIRONMENTALENGINEERING(,266071):根据腐蚀机理的不同,金属的腐蚀可分为8种类型根据笔者从事金属腐蚀研究40余年的累积结果,整理了各种腐蚀类型的典型腐蚀形貌可供从事腐蚀控制和腐蚀研究的工作人员用来辨别各种腐蚀类型,从而判断腐蚀破损原因,明确解决腐蚀问题的方向:金属;腐蚀;形貌:TG172.3:A:1672-9242(2006)04-0031-07:2006-03-24:(1939-),,,TypicalCorrosionAppearanceofMetalsWANGYue-yi(LuoyangShipMaterialResearchInstitute,Qingdao266071,China)Abstract:Bycollectingthephotosoftheappearanceofspecimeninthecorrosiontestfinishedinpastdecades,wechosenthetypicalonesforeveryformsofcorrosionanddisplayedthem.Wediscussedthedifferencebetweentheformsofcorrosionwhichareeasytobeconfused.Keywords:meta;lcorrosion;appearance,,,,,8:[1]1,,,12,,,2,#31#200681F5Fig.1GeneraluniformcorrosionoftypeLF5aluminumoccurredinflowingsea-water2E32Fig.2GeneralcorrosionoftypeE32steeloccurredincircleimmersingtest62.1,,,331.0Cr18Ni9TiFig.3Pittingcorrosionof0Cr18Ni9Tistainlesssteelinhightemperatureandhighpurewater2.2,,,,42.3,470/30Fig.4Pittingcorrosionof70/30copper-nickelalloyintheseawater,,55E323hFig.5Patchycorrosionofsteelafter3hofperiodicimmersion2.4,,66ZCE36Fig.6UlcerationoftypeZCE36steelaftersaltspraytest2.5,,,,7#32#34:7AZIFig.7PockingoftypeAZIalloyintheflowingseawater2.6,8870/30Fig.8Perforationofcoolingtubemadeof70/30copper-nickel32:,3.1,,,,,,,70/30,,;,,2:3.1.1,99ZHMn55-3-1Fig.9UniformdezincificationofZHMn55-3-1yellowbrass3.1.2;,1010ZHAl67-5-2-2Fig.10Plug-typedezinc-ironcorrosionoftheZHAL67-5-2-2Albrass3.2,,114,,#33#2006811ZQAl9-2Fig.11Structure-selectivecorrosionofZQAl19-2Albronzeintheflowingsea-water,,,,,,18-8(12)1200Cr18Ni9TiFig.12Intergranularcorrosionoftype00Cr18Ni9Tistainlesssteelinhigh-temperatureandhigh-purewater5,,,,,,,,,1313()Fig.13Galvaniccorrosionofaluminum-aluminum-steelexplosivejointsinthesplashzone6,4:,,,,,14645-,,14Fig.14Appearanceofcorrosioninthecreviceformedbypipesandpipeboard7,3:,;#34#34:,;7.17.1.11),151615Fig.15Splayinglinearcracking16Fig.16Insplayinglinearcracking2),171817Fig.17Splayingbranchcracking18Fig.18Insplayingbranchcracking7.1.2(19)19Fig.19Crosssectionofstresscorrosioncracking7.2,,2020Fig.20Appearanceofcorrosionfatiguecrackingonheatingtubeofcarbonsteel7.3,,1),2121Fig.21Peelingcorrosionappearanceoftype919aluminumalloyinflowingseawater#35#200682),22A-lMg(9%)225Fig.22Appearanceonthesideoffivesamples8,,,2:8.1,,61),2323ZHSi80-3Fig.23GrainappearingofZHSi80-3siliconbrassintheflowingseawater2),24253)24Q235Fig.24AppearanceofconfusedflowstreamlineofQ235steelintheflowingseawater25Q235Fig.25AppearanceoflaminarflowstreamlineofQ235steelintheflowingseawater,,2626TUPFig.26Horse-hoo-fprintpitonthesurfaceofTUPcopperafterthesimulatedpipetest4),275),,286),29#36#34:27HT200+Ni(3%)Fig.27CorrosionofHT200+nickel(3%)castironintheflowingseawatercontainingsand28TUPFig.28DecreasingofthethicknessofthepipemadebyTUPcopper29120bFig.29Perforationintheturningofthecopperpipe8.2:,:,,3099.130Fig.30Cavitationdamageintherootoftitaniumalloyscrew,,3131Fig.31Vaporerosionofthepipesontheupperofcoolingsystem9.2,,,32,90/10,,32Fig.32Appearanceofthestraycurrentcorrosiononthewater-coolingpipe:[1]MG.(2)[M].,.:,1982.#37#