Galvanic kev tiv thaiv kev tsim qauv rau cov nqaj hlau thiab cov ceev ceev
Vim li cas thiaj muaj lub galosion corrosion tshwm sim ntawm kev ntsia thiab bolts?
Cov ntsia hlau feem ntau yog ua los ntawm cov roj carbon steel lossis qis {{- alloy steel, thaum bolts- lub zog alloyoy. Ob yam khoom siv muaj cov peev txheej sib txawv, sib sau cov galvanic cell hauv electrolyte ib puag ncig xws li noo noo thiab ntsev. Cov ntsia muaj qis dua electrode tej peev xwm, ua yeeb yam raws li anodes thiab tab sis kev xeb oxidative (xeb); Bolts muaj peev xwm ntau dua, ua yeeb yam raws li Cathodes {{}}}}} acceler acceler though tsawg corrosive lawv tus kheej, lawv nrawm anode (kev tsheb nqaj hlau) corrosion. Galvanic corrosion yuav tsum muaj peb qhov mob: cov khoom muaj peev xwm sib txawv, piv txwv li dej nag, av noo ntawm cov hlau. Cov ciav hlau raug nthuav tawm sab nraum zoov ntev - lub sij hawm; Dej nag thiab ntsev rau hauv cov pa ua cov yeeb yaj kiab uas yog siv hluav taws xob electrolyte, enabling galvanic corrosion. Qhov kev ua kom puas tsuaj ntawm cov tsheb ciav hlau {{11} bolt sib txuas, txo kev sib txuas lub zog, thiab txawm tias yuav muaj kev phom sij kev nyab xeeb.
Dab tsi yog qhov muaj kev phom sij tseem ceeb ntawm Galvanic corrosion los teev tshuab?
Galvanic Corrosion ua xeb ib ncig ntawm kev tsheb nqaj hlau ntsia liaj qhov rooj, nthuav dav kom haum ntawm bolts thiab ntsia kom xoob sib txuas thiab txo kom txo qis kev ruaj khov. Corrosion hnyav tsis muaj zog hla hla-}}}}}}} {nquag mus rau cov kab nrib pleb hauv kev thauj khoom thiab cov kev pabcuam luv luv. Txawm hais tias bolts yog Cathodes, lawv cov npoo sib dhos demrade vim ntev- todrosion, ua rau lub ntsia liaj qhov cub thiab txo qis. Galvanic corrosion kuj cuam tshuam khiav ralkuitity conductivity, cuam tshuam nrog kev sib kis tus mob thiab ua rau kev coj ua tsis huv kev tsav tsheb. Hauv hiav txwv ntug hiav txwv thiab huab cua, Galvanic corrosion, muaj peev xwm txo lub neej sib xyaw los ntawm ntau dua 50% thiab nce nqi kho mob.
Yuav ua li cas txo galvanic corrosion los ntawm cov khoom sib tw?
Lub ntsiab lus tseem ceeb yog los xaiv cov khoom siv sib xyaw nrog cov muaj peev xwm sib xyaw hluav taws xob muaj peev xwm txo qhov sib txawv. Piv txwv li, yog tias kev sib tw siv U71MN Carbon Steel, Bolts tuaj yeem ua khub nrog tib hom qis- alllo cov hlau bolts kom txo qhov sib txawv. Zam kev sib cuag ncaj qha ntawm cov hlau stainless bolts thiab dog dig carbon hlau ntsia {4} lawv muaj peev xwm loj ua rau loj galosion. Yog tias stainless hlau bolts yog qhov tsim nyog, siv martensitic stainless hlau (los ze zog rau cov roj carbon hlau) hloov ntawm Austenitic steel. Hnyav {{{{{} haul railways tuaj yeem siv cov ntsia hlau tsis zoo. Cov khoom siv cov khoom siv kuj txiav txim siab ib puag ncig: Thaj chaw ntug hiav txwv ua ke rau kev tiv thaiv ntau ntxiv rau hauv compvanic corrosion.
Lub luag haujlwm dab tsi uas rwb thaiv tsev kev tiv thaiv ua si hauv Galvanic Kev Tiv Thaiv Corrosion?
Rwb thaiv tsev tiv thaiv cov inhibits galvanic corrosion los ntawm kev thaiv hluav taws xob sib txuas ntawm cov nqaj hlau thiab cov khoom siv ceev ceev, cuam tshuam ntawm cov galvanic cell tsim. Cheebtsam insulating muaj xws li gauge cov ntaub qhwv, insulating ntaub, thiab insulating wasters, ntsia nruab nrab ntawm ntsia thiab nias daim hlau. Insulating warters yog feem ntau ua los ntawm high- Lub zog nylon lossis epoxy rwb thaiv tsev ntau dua los yog sib luag rau 1 × 10 teev, zoo thaiv kev ua haujlwm tam sim no. Insulating gauge blocks tsis tsuas yog muab rwb thaiv tsev tab sis kuj kho ntsuas, muab cov phiaj xwm sib luag. Hauv cov hluav taws xob tsheb nqaj hlau thaiv, Rwb Kev Tiv Thaiv Kev Tiv Thaiv Tiv Thaiv Kev Txwv tsis pub dhau los ntawm kev ua haujlwm galvanaic corrosion thaum ua haujlwm hauv kev ua haujlwm ncig ua haujlwm. Rwb thaiv thaiv kev tiv thaiv yog tus nqi -}} Ua tau zoo thiab ua tau zoo, los ua cov qauv kev tiv thaiv corrosic hauv cov tshuab.
Dab tsi yog qhov sib txawv hauv Galvanic Corrosion tiv thaiv kev tsim thoob cov chaw ib puag ncig?
Hauv cov ntug dej hiav txwv ntsev ib puag ncig, ntxiv rau kev tiv thaiv rwb thaiv tsev, {}} dip galvanizing + reetring txheej) kom txhim kho ntsev txau kuj tsis kam. Hauv thaj chaw qhuav, kev tiv thaiv tuaj yeem ua kom yooj yim-}} Cov tshuaj tiv thaiv corrosion los txo cov nqi. Hauv cov chaw noo thiab los nag, Ntaus qauv tsim rau cov Cheebtsam insulating yog txhawb kom tiv thaiv noo noo infiltration thiab tswj hwm rwb thaiv tsev ua tau zoo. Hauv cov ntawv alpine, insulating cov ntaub ntawv siv tsawg - kub hloov cov tshuab sib xyaw kom tsis txhob mob khaub thuas thiab cov rielation tsis ua hauj lwm. Kev Railways siv hluav taws xob yuav tsum muaj siab dua (rwb thaiv tsev tsis kam loj dua lossis sib npaug