Uninzi lwabantu lucinga ukuba insimbi engenasici yintsimbi engayi kugqwala kwaye iyakwazi ukumelana neasidi kunye nealkali.Kodwa kubomi bemihla ngemihla, abantu bafumanisa ukuba iimbiza zentsimbi engatyiwayo neeketile zombane ezisetyenziselwa ukupheka zidla ngokuba namabala erusi okanye amabala erusi.Kwenzeka ntoni kanye kanye?
Masiqale siqonde, yintoni intsimbi engatyiwayo?
Ngokomgangatho wesizwe we-GB / T20878-2007 "I-Stainless Steel kunye ne-Heat-Resistant Steel Grades and Chemical Compositions", inkcazo yensimbi engenasici yile: insimbi engenasici kunye nokuxhatshazwa kwe-corrosion njengeempawu eziphambili, kunye nomxholo we-chromium ubuncinane ubuncinane be-10.5%. kunye nomxholo wekhabhoni ongekho ngaphezu kwe-1.2%.intsimbi.Iindidi ezichasayo kwimidiya yokubola kweekhemikhali (i-asidi, i-alkali, ityuwa, njl.) Zibizwa ngokuba yintsimbi echasene ne-asidi.
Kutheni ke intsimbi engatyiwayo ikwazi ukumelana nokudleka?
Ngenxa yokuba insimbi engenasici, emva kokuba yenziwe, iya kuthabatha i-pickling ebanzi kunye ne-passivation ukususa zonke iintlobo zeoli, i-rust kunye nolunye ukungcola phezu komhlaba.Umphezulu uya kuba yisilivere efanayo, wenze ifilimu efanayo kunye ne-dense passivation film, ngaloo ndlela inciphisa ukuxhathisa kwensimbi engenasici kwi-oxidizing media.Izinga lokuthotywa eliphakathi kunye nokuphuculwa kokuxhathisa umhlwa.
Ke ngefilimu enjalo ye-passivation kwintsimbi engenasici, ngaba ngokuqinisekileyo ayiyi kuhlwa?
Enyanisweni, kubomi bethu bemihla ngemihla, i-chloride ion kwityuwa inefuthe elitshabalalisayo kwifilimu engabonakaliyo yensimbi engenasici, enokubangela ukuba imvula yezinto zetsimbi.
Okwangoku, ngokwethiyori, kukho iintlobo ezimbini zomonakalo kwifilimu yokudlula ebangelwa yi-chlorine ion:
1. Ithiyori yefilimu yeSigaba: Iiyoni zekloridi zinerediyasi encinci kunye nobuchule obunamandla bokugqobhoza.Bangakwazi ukungena ngokulula kwiindawo ezincinci kakhulu kwifilimu ye-oxide, bafikelele kwi-metal surface, kwaye basebenzisane nesinyithi ukwenza iikhompawundi ezinyibilikayo, ezitshintsha isakhiwo sefilimu ye-oxide.
2. Ithiyori ye-Adsorption: I-ion ye-chloride inamandla anamandla okuba i-adsorbed ngesinyithi.Ziyakwazi ukubhengezwa ngeentsimbi ngokukhethayo kwaye zikhuphe i-oksijini kumphezulu wesinyithi.I-chloride ion kunye ne-oxygen ion zikhuphisana ngamanqaku e-adsorption kwi-metal surface kwaye zenze i-chloride ngesinyithi;I-adsorption ye-chloride kunye nesinyithi ayizinzile, isenza izinto ezinyibilikayo, ezikhokelela kwi-corrosion ekhawulezayo.
Ukuhlolwa kwentsimbi engenasici:
Ukuhlolwa kwensimbi engenasici kwahlulahlulwe kwiimvavanyo ezintandathu zokusebenza kunye neeprojekthi ezimbini zokuhlalutya
Uvavanyo lokuSebenza:
Iimpawu ezibonakalayo, iipropathi zekhemikhali, iipropathi zoomatshini, ukuqhubekeka, ukuhlolwa kwe-metallographic kunye nokuhlolwa okungonakalisi
Iprojekthi yohlalutyo:
Uhlalutyo lokuqhekeka, uhlalutyo lwe-corrosion, njl.;
Ukongeza kwimigangatho esetyenziselwa ukwahlula i-GB/T20878-2007 "iNtsimbi eStainless kunye ne-Heat-Resistant Steel Grades kunye neMichiza yeMichiza", kukwakho:
GB/T 13305
GB/T 13671
GB/T 19228.1, GB/T 19228.2, GB/T 19228.3
I-GB / T 20878 Insimbi engenasici kunye nemigangatho yensimbi enganyangekiyo ekushiseni kunye nokuqulunqwa kweekhemikhali
Umgangatho kazwelonke wokuhlola i-stainless steel grade-grade yi-GB9684-2011 (imveliso yensimbi engenasici).Ukuhlolwa kwensimbi engenasici yokutya ihlukaniswe ngamacandelo amabini: izinto eziphambili kunye nezinto ezingezona eziphambili.
Indlela yokusebenza:
1. Ukumakisha: Uvavanyo lwensimbi engenasici lufuna ukuphawula iziphelo zezixhobo zokuvavanya ngepeyinti yemibala eyahlukeneyo.
2. Ukuprintwa: Indlela yokutshiza ipeyinti kwiindawo (iziphelo, ubuso bokugqibela) obuchazwe ekuhloleni, ebonisa ibakala, umgangatho, iinkcukacha, njl njl.
3. Ithegi: Emva kokuba uhlolo lugqityiwe, izinto eziphathekayo ziya kufakwa kwii-bundle, iibhokisi, kunye neeshafti ukubonisa ibakala, ubukhulu, ubunzima, inombolo esemgangathweni, umthengisi, njl.
Ixesha lokuposa: Dec-27-2023