Munguva yekubata, kuungana, kukweshesa, welding seam yekuongorora, uye kugadzirisa kwemukati liner ndiro, midziyo, uye zvishongedzo zvematangi esimbi isina tsvina, zvinosvibisa zvakasiyana-siyana zvakaita semafuta emafuta, makwara, ngura, tsvina, yakaderera-inonyungudika-inosvibisa simbi inosvibisa. , pendi, welding slag, uye splatter zvinounzwa.Zvinhu izvi zvinokanganisa kunaka kwesimbi isina simbi, zvinokuvadza firimu rayo, zvinoderedza kusaora kwepasi, uye kuita kuti ive nyore kune inoparadza midhiya muzvigadzirwa zvemakemikari zvinotakurwa gare gare, zvichitungamira kugomba, intergranular corrosion, uye kunyange kusagadzikana ngura kutsemuka.
Matangi esimbi asina tsvina, nekuda kwekutakura makemikari akasiyana-siyana, ane zvinodiwa zvakanyanya kudzivirira kusvibiswa kwemutoro.Sezvo hunhu hwepamusoro hwemarata esimbi anogadzirwa mudzimba husina kusimba, zvakajairika kuita michina, makemikari, kanaelectrolytic polishingpamahwendefa esimbi isina tsvina, zvishandiso, uye zvishongedzo zvisati zvacheneswa, kunhonga, uye kupfuudza kuti uwedzere kusimba kwekuora kwesimbi isina simbi.
Iyo passivation firimu paStainless simbi ine hunhu hunochinja uye haifanirwe kutorwa sekumiswa zvachose kune ngura asi kuumbwa kweiyo inopararira yekudzivirira layer.Inowanzova yakakuvadzwa pamberi pezvinoderedza (zvakadai se chloride ions) uye inogona kudzivirira nekugadzirisa muhupo hwezvinokonzera (zvakadai semhepo).
Kana simbi isina tsvina yaiswa kumhepo, firimu reoxide rinoita.
Zvisinei, zvinhu zvekudzivirira zvemufirimu uyu hazvina kukwana.Kuburikidza ne acid pickling, avhareji ukobvu hwe10μm yesimbi isina tsvina pamusoroyakasvibiswa, uye kemikari yeasidhi inoita kuti chiyero chekunyungudika panzvimbo dzakaremara chikwire kupfuura dzimwe nzvimbo dzepamusoro.Nokudaro, pickling inoita kuti nzvimbo yose iite kuenzanisa.Zvakakosha, kuburikidza nekunhonga uye passivation, simbi nemaokisi ayo anonyungudika zvakanyanya kana ichienzaniswa nechromium nemaokisi ayo, ichibvisa chromium-yakapera layer uye kupfumisa pamusoro nechromium.Pasi pekuita kwekuita kweoxidants, firimu rakazara uye rakagadzikana passivation firimu rinoumbwa, riine mukana weiyi chromium-rich passivation firimu inosvika +1.0V (SCE), padyo nekugona kwesimbi dzakasimba, inosimudzira kugadzikana kwekusagadzikana.
Nguva yekutumira: Nov-28-2023