Koj puas paub dab tsi yog qhov ua rau hlau corrosion?

Cov yam ntxwv cuam tshuam rau hlau Corrosion

Hlau corrosion yog qhov ua rau hlau tsis ua hauj lwm thiab feem ntau manifests nws tus kheej li xeb ntawm cov hlau nto, uas tuaj yeem rhuav tshem cov luster thiab kev zoo nkauj ntawm cov khoom thiab ua rau nws lub neej luv. Muaj ntau yam nyob rau hauv ib puag ncig ntuj uas ua rau hlau corrosion (humidity, atmospheric pollutants, seawater, av, thiab lwm yam) thiab lawv yog unavoidable.

Atmospheric corrosion

Atmospheric corrosion yog hais txog kev puas tsuaj ntawm cov ntaub ntawv hlau lossis cov tsev uas tshwm sim los ntawm cov tshuaj lom neeg lossis cov tshuaj electrochemical nyob rau hauv atmospheric tej yam kev mob. Cov ntaub ntawv hlau siv nyob rau hauv huab cua account rau ntau tshaj 60% ntawm tag nrho cov tsim nyob rau hauv lub ntiaj teb no, thiab cov hlau poob vim atmospheric corrosion account rau ntau tshaj 50% ntawm tag nrho cov corrosion. Qhov tshwj xeeb ntawm cov hlau corrosion feem ntau cuam tshuam los ntawm cov av noo hauv cov huab cua thiab cov ntsiab lus ntawm ntau yam pa phem.

Seawater corrosion

Cov av noo, ntws tus nqi thiab pH tus nqi ntawm cov dej hiav txwv, nrog rau cov ntsev, yaj oxygen, cov kab mob hauv hiav txwv thiab cov organic decaying hauv dej hiav txwv yog qhov tseem ceeb ua rau dej hiav txwv corrosion.Cov txheej txheem corrosion ntawm cov hlau feem ntau hauv dej hiav txwv yog cov txheej txheem oxygen depolarization, thiab tus nqi corrosion yog tswj los ntawm cov txheej txheem oxygen diffusion.Metals nyob rau hauv seawater yog prone rau lub zos corrosion puas, xws li pitting corrosion, crevice corrosion, turbulent corrosion thiab cavitation corrosion.

av corrosion

Av yog ib qho nyuaj heev, heterogeneous, multiphase system muaj li ntawm cov av hais, aqueous daws, gases, organic teeb meem, them colloids, mucus colloids, thiab lwm yam. corrosion, ua rau underground hlau chaw raug kev txom nyem loj heev hauv zos corrosion.

Tshuaj corrosion

Tshuaj corrosion yog hais txog kev puas tsuaj los ntawm cov tshuaj tiv thaiv ncaj qha ntawm cov hlau thiab cov hlau tsis yog electrolyte. Cov txheej txheem corrosion yog cov tshuaj dawb huv ntawm cov ntshiab oxidation thiab txo. Nws txhais tau hais tias qhov nruab nrab corrosive ncaj qha cuam tshuam nrog cov atoms ntawm cov hlau nto los tsim cov khoom siv corrosion. Cov tshuaj tiv thaiv corrosion feem ntau yog cov kua qaub, alkalis, thiab ntsev

Hom hlau corrosion

Uniform Corrosion

Taw qhia:Uniform corrosion hais txog corrosion uas tshwm sim ntawm tag nrho cov nto los yog loj cheeb tsam ntawm ib tug hlau. Hom corrosion no feem ntau yog tshwm sim los ntawm lub sij hawm ntev ntawm cov hlau mus rau corrosive media, xws li acids, alkalis thiab lwm yam tshuaj.
Corrosion yam ntxwv:Tus nqi corrosion kuj zoo ib yam, cov hlau maj mam ua thinner, thiab tej zaum yuav ua rau cov txheej txheem tsis ua hauj lwm.
Kev tiv thaiv:Txhawm rau tiv thaiv kev xeb tsis sib xws, koj tuaj yeem xaiv cov khoom siv tiv thaiv corrosion los yog siv cov tshuaj tiv thaiv corrosion.

Crevice Corrosion

Taw qhia:Crevice corrosion tshwm sim hauv cov kab nrib pleb lossis lwm qhov chaw zais ntawm cov hlau nto.
Nta:Qhov nruab nrab corrosive nyob rau hauv cov hlau crevice yog nyob rau hauv ib tug stagnation ntawm lub xeev, ua kom ceev corrosion ntawm kev sib txuas ntawm hlau accessories.
Kev tiv thaiv:Txhawm rau tiv thaiv kev txhim kho corrosion, qhov khoob thiab qhov chaw tuag hauv qhov tsim yuav tsum raug txo kom tsawg, thiab cov khoom siv saum npoo yuav tsum huv thiab qhuav.

Galvanic corrosion kuj

Taw qhia:Kev sib cuag corrosion tshwm sim thaum ob lub hlau uas muaj peev xwm sib txawv tuaj rau hauv kev sib cuag thiab muab tso rau hauv cov tshuaj electrolyte.
Nta:Cov hlau uas muaj peev xwm tsis zoo yuav corrode sai dua, thaum cov hlau uas muaj peev xwm muaj peev xwm tiv thaiv ntau dua.
Kev tiv thaiv:Kev zam kev sib cuag ncaj qha ntawm cov hlau sib txawv lossis siv cov ntaub ntawv insulating los cais lawv yog txoj hauv kev zoo los tiv thaiv kev sib cuag corrosion.

Pitting Corrosion

Taw qhia:Pitting yog sib sib zog nqus corrosion concentrated ntawm me me ntawm cov hlau nto.
Nta:Pitting feem ntau tshwm sim hauv ib puag ncig uas muaj cov oxidants muaj zog xws li chloride ions. Pitting tuaj yeem ua rau lub qhov me me rau ntawm qhov chaw hlau, yog li ua rau lub zog ntawm cov khoom siv tsis muaj zog.
Kev tiv thaiv:Xaiv cov ntaub ntawv uas tiv taus pitting, tswj kev tiv thaiv ib puag ncig corrosion, thiab kev tshuaj xyuas thiab tu tsis tu ncua yog tus yuam sij rau kev tiv thaiv pitting.

Intergranular Corrosion

Taw qhia:Intergranular corrosion yog corrosion uas txuas mus rau sab hauv raws qhov sib txuas ntawm cov nplej hlau. Nws yog tsuas yog tshwm sim los ntawm lub xub ntiag ntawm grain ciam impurities los yog nyob rau hauv kev ntxhov siab.
Nta:Intergranular corrosion yuav rhuav tshem cov ntawv cog lus ntawm cov nplej thiab txo cov neeg kho tshuab lub zog ntawm cov hlau.
Kev tiv thaiv:Xaiv cov ntaub ntawv uas tiv taus intergranular corrosion, tswj qhov kub thiab txias thaum kho cua sov thiab vuam, thiab kev kho kom haum rau saum npoo yog ntsuas los tiv thaiv intergranular corrosion.

Dew Point Corrosion

Taw qhia:Dew point corrosion feem ntau tshwm sim hauv cov nroj tsuag tshuaj thiab lwm qhov chaw uas muaj corrosive media thiab dej vapor.
Nta:Thaum qhov nruab nrab kub qis dua qhov dej dew point kub, dej vapor yuav condense ntawm cov hlau nto thiab ua hauj lwm ua ke nrog corrosive nruab nrab los ua corrosion.

Kev tiv thaiv:Kev tiv thaiv thiab kev teb rau cov dej dew point corrosion muaj xws li kev tswj qhov kub thiab av noo, siv cov khoom tiv thaiv corrosion, thiab tu thiab tu cov cuab yeej tsis tu ncua.

Kev nyuaj siab Corrosion Cracking

Hlau Corrosion Ceev faj

Xaiv cov khoom siv nrog corrosion kuj zoo, optimizing cov cuab yeej tsim thiab tsim cov txheej txheem, txo qhov khoob thiab qhov chaw tuag, tswj kev tiv thaiv corrosion nyob rau hauv ib puag ncig, thiab tsis tu ncua kev tshuaj xyuas thiab tswj cov cuab yeej tuaj yeem ua tau zoo rau kev pab cuam lub neej ntawm cov khoom siv hlau thiab xyuas kom muaj kev nyab xeeb.

Kev xaiv cov khoom tsim nyog

Xaiv cov ntaub ntawv uas tsis hnov tsw rau kev ntxhov siab corrosion los yog muaj kev ntxhov siab zoo corrosion kuj.Aluminium alloy yog cov hlau siv dav nrog cov muaj zog corrosion kuj.Different series ntawm txhuas alloys muaj qhov sib txawv corrosion kuj thiab daim ntawv thov ib puag ncig.

1 Series

Aluminium alloy:1050 1060 1100, thiab lwm yam.
Corrosion kuj:Muaj ntau dua 99.00% aluminium, zoo corrosion kuj
Daim ntawv thov:Feem ntau yog siv rau hauv kev lag luam chemical thiab lub hom phiaj tshwj xeeb.

2 Series

Aluminium Alloy: 2017 2024
Corrosion kuj:Series 2 yog ib qho txhuas alloy nrog tooj liab ua lub ntsiab alloying, thiab muaj ib tug loj nyiam rau intergranular corrosion.
Daim ntawv thov:aviation kev lag luam, khoom siv thiab kev lag luam nrog kev ua haujlwm siab

3 Series

Aluminium alloy:3003 3004 3105
Corrosion kuj:Aluminium alloy nrog manganese ua cov ntsiab lus alloying (manganese cov ntsiab lus yog 1.0-1.5%). Nws tsis tuaj yeem kho cov cua sov thiab ua kom muaj zog, thiab nws cov corrosion kuj zoo dua li ntawm 1 series.
Corrosion kuj:Kev lag luam aviation, cov khoom siv hauv tsev hauv qhov hnyav hnyav,

4 Series

Aluminium alloy: 4004 4032 4043
Corrosion kuj:4 series aluminium alloy yog aluminium alloy nrog silicon ua lub ntsiab alloy. Yog tias Si ntau dhau ntawm qhov sib cuam tshuam intergranular, nws yuav ua rau muaj kev cuam tshuam ntawm intergranular.

Daim ntawv thov:Cov khoom siv ntxiv rau aluminium alloy vuam.

5 Series

Aluminium alloy:5052

Corrosion kuj:5 series muaj corrosion kuj zoo, thiab tuaj yeem txhim kho corrosion kuj nyob rau hauv tsis muaj zog alkaline tov. Cov dej hiav txwv zoo heev
Daim ntawv thov:seaside cov tsev, aircraft roj tank kav, cov khoom siv tank

6 Series

Aluminium alloy: 6061 6063
Corrosion kuj:Feem ntau magnesium thiab silicon, zoo corrosion kuj, zoo vuam kev ua tau zoo, zoo txheej txheem kev ua tau zoo, zoo oxidation xim kev ua tau zoo.
Daim ntawv thov:Kev lag luam tsheb thauj mus los (xws li lub qhov rooj tsheb, lub cev tsheb, lub dab dej kub, thiab lwm yam)

7 Series

Aluminium alloy:7050 7075

Corrosion kuj:7 series aluminium alloy muaj zinc thiab tooj liab, thiab tsis zoo corrosion kuj
Daim ntawv thov:Aviation (aircraft load-bearing components, landing gear), rockets, propellers, thiab spacecraft.

8 Series

Aluminium alloy:8011

Corrosion kuj:8 series aluminium alloy lithium, hlau alloy ntsiab, nrog siab rigidity thiab zoo tshav kub kuj thiab tshwj xeeb cov khoom
Daim ntawv thov:Cua txias aluminium foil

Txhim kho cov txheej txheem ntau lawm

Nto huv si

Yog hais tias qhov saum npoo ntawm aluminium coil tsis raug ntxuav kom zoo, tus passivator tsis tuaj yeem tsim cov yeeb yaj kiab hloov dua siab tshiab nrog cov aluminium alloy thiab cov kev kho mob passivation yuav ua tsis tiav.

Xaiv cov dej zoo.

Cov dej huv los yog dej deionized yuav tsum tau siv rau hauv cov txheej txheem ntxuav thaum lub sij hawm passivation, uas tuaj yeem txo qhov cuam tshuam ntawm impurity ions ntawm cov txheej txheem tshuaj passivation, yog qhov tsim nyog rau kev tsim cov tshuaj passivation, yog qhov tsim nyog rau purity ntawm cov khoom siv tshuaj lom neeg. , thiab yog qhov zoo rau kev txhim kho corrosion kuj ntawm aluminium alloy tom qab passivation.

Tswj qhov kub thiab txias

Lub ci kub tom qab passivation yuav tsum tau tswj ntawm ib ncig ntawm 100 degrees. Qhov kub thiab txias dhau lawm yuav ua rau cov tshuaj hloov pauv cov yeeb yaj kiab ntawm cov aluminium alloy nto tawg, rhuav tshem cov corrosion kuj ntawm aluminium alloy tom qab passivation.

Hais txog Hanchen Hlau

Shandong Hanchen Hlau Co., Ltd yog cov kws tshaj lij xim coated aluminium chaw tsim tshuaj paus kev tsim khoom, muag thiab kev lag luam. Peb tau cog lus los muab cov neeg siv khoom nrog cov khoom lag luam siab thiab cov kev pabcuam txaus siab thiab cov kev daws teeb meem zoo.