I-pitting corrosion ikwabizwa ngokuba yi-corrosion encinci, i-pitting okanye i-pitting.
Yindlela yokonakala kwe-corrosion apho uninzi lomphezulu weintsimbi yenzaayidleki okanye idle kancinci kakhulu, kodwa imingxunya enomhlwa ivela kwiindawo zengingqi kwaye iphuhle nzulu.Eminye imingxuma ikhona yodwa, ngelixa eminye idityanisiwe kwaye ikhangeleka ngathi yindawo erhabaxa.Imingxunya ye-Etch ingaba mikhulu okanye encinci, kodwa incinci ngokubanzi, njengoko kubonisiwe kulo mzobo ulandelayo imingxuma yemingxuma enqamlezileyo, ngokobungakanani, ubunzulu bomngxuma we-etch bulingana okanye bukhulu kunobubanzi bomngxuma we-etch.I-Pitting yenye yeendlela ezinobungozi zokubola kwe-duplex steel stainless steel.Imingxuma yokugqobhoza idla ngokuba yindawo yokuqala yokuqhekeka koxinzelelo kunye neentanda zokudinwa.
Yenziwe ngentsimbi eshayinayoifilimu ye-surface passivation ngenxa yobukho beziphene kwinsimbi engenasici, i-inclusions kunye ne-solutes, njenge-inhomogeneity, ukwenzela ukuba ifilimu ye-passivation ibe buthathaka kakhulu kwezi ndawo, kwisisombululo esithile esihlwabusayo sitshabalaliswa ngokulula, ukutshatyalaliswa kwenxalenye ye-anode kuba isebenze, indawo ejikelezileyo iba yindawo ye-cathode, umlinganiselo wendawo yezimbini incinci kakhulu, i-anodic current density inkulu kakhulu, umsebenzi we-solvation ukhawuleze, kwaye emva koko ube inani lemigodi efana nenaliti.
Insimbi engenasici, kunye nezinye iintsimbi ezithembele kuyoukuthandabuzaukuxhatshazwa kwe-corrosion, kwisisombululo esiqulethe i-anion ethile (i-chloride, i-bromide, i-hypochlorite, okanye i-ion thiosulfate).Logama nje amandla okumhlwa (okanye amandla asetyenzisiweyo ngexesha le-anodic polarisation) idlula i-Eb enokubakho yokugalela, ukugqobhoza kunokwenzeka.Indlela yokufaka i-corrosion ye-duplex steel stainless iyafana nezinye iintsimbi ezingenasici.
Metal unyangokunye nemidiya ye-oxidising, isantya sokubola kwayo kuneyokuqala ingaphathwanga phambi kokuncipha okubonakalayo kwinto eyaziwa ngokuba yi-metal passivation.Indlela yokudlula ingasetyenziselwa ukuchaza ithiyori yefilim encinci, oko kukuthi,ukuthandabuzakungenxa yendima yentsimbi kunye nemidiya ye-oxidising, indima yentsimbi yomphezulu ukuvelisa ifilimu ebhityileyo kakhulu, eshinyeneyo, elungileyo, inokudityaniswa ngokuqinileyo kwifilimu yentsimbi.Le filimu ibe kwisigaba esahlukileyo ikhona, ngokuqhelekileyo ioksijini kunye neekhompawundi zetsimbi.Idlala indima yentsimbi kunye nomhlwa eendaba zahlulwe ngokupheleleyo kwindima yokuthintela isinyithi kunye nemithombo yeendaba enomhlwa ukudibana ngqo, ukuze isinyithi ngokusisiseko uyeke ukunyibilika ukwenza imo passivated ukuthintela isiphumo umhlwa.
Ixesha lokuposa: Dec-27-2023