1) Ukuhlelwa kovavanyo lwesitshizi setyuwa
Uvavanyo lwesitshizi setyuwa kukulinganisa ngokwendalo isenzeko somhlwa kwindawo yendalo ukuze kuvavanywe ukuxhathisa kokubola kwezinto okanye iimveliso.Ngokweemeko ezahlukeneyo zovavanyo, uvavanyo lokutshiza ityuwa lwahlulwe kakhulu lwaba ziindidi ezine: uvavanyo lwesitshizi setyuwa engathathi hlangothi, uvavanyo lokutshiza ityuwa eneasidi, i-ion yobhedu ekhawulezileyo yovavanyo lokutshiza ityuwa kunye novavanyo lokutshiza ityuwa.
1.I-Neutral Salt Spray Test (NSS) yeyona ndlela yakuqala kwaye isetyenziswa kakhulu ekuvavanyeni ukuthotywa okukhawulezileyo.Uvavanyo lusebenzisa i-5% ye-sodium chloride isisombululo se-saline, ixabiso le-PH lihlengahlengiswa kuluhlu olungathathi hlangothi (6-7), ubushushu bokuvavanya ngu-35 ℃, imfuno yesantya sokuhlaliswa kwetyuwa phakathi kwe-1-2ml / 80cm2.h.
2.Uvavanyo lwe-Acid Salt Spray (ASS) luphuhliswa ngokwesiseko sovavanyo lwesitshizi setyuwa engathathi hlangothi.Uvavanyo longeza i-glacial acetic acid kwi-5% yesisombululo se-sodium chloride, esinciphisa ixabiso le-pH lesisombululo malunga ne-3.Izinga lokubola kwayo malunga nokuphinda kathathu kovavanyo lwe-NSS.
Uvavanyo lwe-3.Copper ion olukhawulezileyo lokutshiza ityuwa (CASS) luvavanyo olusanda kuphuhliswa lwangaphandle olukhawulezayo lokutshiza ityuwa.Iqondo lokushisa lokuvavanya ngu-50 ℃, kunye nenani elincinci letyuwa yobhedu - i-chloride yobhedu yongezwa kwisisombululo setyuwa, esenza ngamandla ukugqwala, kwaye izinga lokubola kwayo malunga namaxesha angama-8 kuvavanyo lwe-NSS.
4.Uvavanyo lokutshiza ityuwa lulunye luvavanyo olubanzi lwesitshizi setyuwa, olulutshintsho lovavanyo lokutshiza lwetyuwa olungathathi hlangothi, uvavanyo lobushushu obumanzi kunye nolunye uvavanyo.Ikakhulu isetyenziselwa yonke imveliso yohlobo lombhobho, ngokungena kwendawo efumileyo, ukwenzela ukuba i-corrosion yetyuwa yokutshiza ingaveliswa kuphela kumphezulu wemveliso, kodwa nangaphakathi kwimveliso.Yimveliso kwisitshizi setyuwa, ubushushu obufumayo kunye nezinye iimeko zokusingqongileyo ezitshintshanayo uguqulo, kwaye ekugqibeleni uvavanye iimpawu zombane kunye nezomatshini zemveliso yonke kunye okanye ngaphandle kweenguqu.
Oku kungasentla sisingeniso esineenkcukacha kwiindidi ezine zovavanyo lwesitshizi setyuwa kunye neempawu zalo.Kwisicelo esisebenzayo, indlela efanelekileyo yokuvavanya ityuwa yokutshiza kufuneka ikhethwe ngokweempawu zemveliso kunye nenjongo yovavanyo.
Itheyibhile 1 ngokubhekiselele kwi-GB/T10125-2021 "Uvavanyo lwe-Artificial atmosphere corrosion test" kunye nezixhobo ezihambelanayo zinika uthelekiso lwesitshizi setyuwa ezine.
Uluhlu loku-1 Uluhlu oluthelekisayo lweemvavanyo ezine zokutshiza ityuwa
| Indlela yokuvavanya | NSS | I-ASS | I-CASS | Ukutshintshana kovavanyo lwesitshizi setyuwa |
| Ubushushu | 35°C±2°℃ | 35°C±2°℃ | 50°C±2°℃ | 35°C±2°℃ |
| Umyinge weqondo lokumisa kwindawo ethe tyaba engama-80㎡ | 1.5mL/h±0.5mL/h | |||
| Ugxininiso lwesisombululo seNaCl | 50g/L±5g/L | |||
| PH ixabiso | 6.5-7.2 | 3.1-3.3 | 3.1-3.3 | 6.5-7.2 |
| Ubungakanani besicelo | Isinyithi kunye ne-alloys, izigqubuthelo zetsimbi, iifilimu zokuguqula, iifilimu ze-anodic oxide, izigqubuthelo zendalo kwii-substrates zetsimbi. | ICopper + Nickel + iChromium okanye iNickel + Chromium yokuhombisa yokuhombisa, i-anodic oxide yokwambathisa kunye nezigqubuthelo zendalo kwialuminiyam. | ICopper + Nickel + iChromium okanye iNickel + Chromium yokuhombisa yokuhombisa, i-anodic oxide yokwambathisa kunye nezigqubuthelo zendalo kwialuminiyam. | Isinyithi kunye ne-alloys, izigqubuthelo zetsimbi, iifilimu zokuguqula, iifilimu ze-anodic oxide, izigqubuthelo zendalo kwii-substrates zetsimbi. |
2) Isigwebo sovavanyo lwesitshizi setyuwa
Uvavanyo lwesitshizi setyuwa yindlela ebalulekileyo yokuvavanya ukuhlwa, esetyenziselwa ukuvavanya ukuxhathisa kokutya kwemathiriyeli kwindawo yokutshiza ityuwa.Iziphumo zendlela yokumisela ziquka indlela yokumisela ukulinganisa, indlela yokumisela ubunzima, indlela yokumisela inkangeleko eyonakalisayo kunye ne-corrosion data statistical analysis method.
1. Indlela yokugweba yokulinganisa ngokuthelekisa umlinganiselo wendawo yokubola kunye nommandla opheleleyo, isampuli yahlulwe ngamanqanaba ahlukeneyo, kunye nenqanaba elithile njengesiseko sokugweba okufanelekileyo.Le ndlela iyasebenza kuvavanyo lweesampulu ezisicaba, kwaye inokubonisa ngokubonakalayo iqondo lokubola kwesampulu.
2. Indlela yesigwebo sokulinganisa ubunzima besampulu ngaphambi nasemva kokuvavanya ubunzima bomhlwa, bala ubunzima bokulahleka kwe-corrosion, ukuze ugwebe iqondo lokunganyangeki kwesampulu.Le ndlela ifanelekile ngokukhethekileyo kuvavanyo lokuxhathisa ukubola kwesinyithi, inokuvavanya ngokobungakanani iqondo lokubola kwesampulu.
3. Indlela yokumisela inkangeleko ebolileyo yindlela yokuzimisela esemgangathweni, ngokujongwa kweesampulu zovavanyo lokutshiza kwetyuwa ukuba zivelise isenzeko somhlwa ukumisela.Le ndlela ilula kwaye inembile, ngoko isetyenziswa ngokubanzi kwimigangatho yemveliso.
4. Uhlalutyo lwezibalo zedatha ye-corrosion inika indlela yokuyila iimvavanyo ze-corrosion, ukuhlalutya idatha ye-corrosion kunye nokumisela izinga lokuzithemba kwedatha ye-corrosion.Isetyenziselwa ikakhulu ukuhlalutya, ukubola kwamanani, kunokuba ngokukodwa ukumiselwa komgangatho wemveliso ethile.Le ndlela inokusebenza kwaye ihlalutye inani elikhulu ledatha ye-corrosion ukwenza izigqibo ezichanekileyo nezithembekileyo.
Isishwankathelo, iindlela zokumisela uvavanyo lokutshiza ityuwa zineempawu zazo kunye nobubanzi bokusetyenziswa, kwaye indlela efanelekileyo kufuneka ikhethwe ukuzimisela ngokweemfuno ezithile.Ezi ndlela zibonelela ngesiseko esibalulekileyo kunye neendlela zokuvavanya ukuxhathisa ukubola kwezinto.
Ixesha lokuposa: Mar-01-2024