I-anti-corrosion epoxy powder coating idlala umsebenzi wokuvikela

Ukusetshenziswa okuhlangene kokuvikela kwe-cathodic kanye nongqimba lokuvikela ukugqwala, kuvumela isakhiwo sensimbi esingaphansi komhlaba noma esingaphansi kwamanzi ukuze sithole ukuvikelwa okonga kakhulu nokuphumelelayo. Ngokuvamile embozwe nge-coating yokuzivikela ngaphambi kokusetshenziswa, endaweni yensimbi kanye ne-dielectric ukwahlukanisa ugesi kagesi, ukunamathela okuhle kungavikela ngaphezu kwe-99% yezakhiwo zangaphandle ekugqwaleni. Ipayipi enamathela ekukhiqizeni, ezokuthutha kanye nokwakhiwa, ayikwazi ngokuphelele isiqiniseko ngokumelene nanoma yimuphi umonakalo (ugcwalise enamathela umlomo, ukuminyana enamathela, pinhole enamathela, njll.), akunakwenzeka ukuba ipayipi ukugqwala imvelo isodwa ngokuphelele. Kodwa futhi nge-anti-corrosion insulation layer yezinto ezihlukahlukene, ngamadigri ahlukahlukene, emunca futhi ephefumulayo, futhi izongcwatshwa kancane kancane. Ukugcina i-anti-corrosion ephumelelayo, kuyadingeka ukuthatha ukuvikelwa kwe-cathodic okungukuthi, ukuvikelwa okuhlangene. Izembatho eziwugqinsi (ukuqina> 1mm), ukuvikelwa okuhlanganyelwe kwepayipi kufanele kukhethwe amandla okuvikela angu- -1.10 kuya ku-1.15V (CSE), uqweqwe oluncane (ubukhulu ≤ 1mm) luthatha amandla okuvikela angu- -1.05 kuya ku-1.10V (CSE), Kucatshangelwa ukwakheka kwenhlabathi, umswakama, izinga lokushisa, izinhlobo zokumboza, ikhwalithi yokunamathela, kanye nama-microorganisms, ukulungiswa okufanele emandleni okuvikela, kokubili ukuvikela ipayipi ngaphandle kokucekela phansi i-anti-corrosion coating. Ukugqwala kwemvelo yokuhlola i-polarization kusebenza kakhulu. "Ukuvikela" kungumqondo obalulekile lapha, okuyi-epoxy ephikisana nokugqwala i-powder coating endaweni, “ukuvikela”?

Ukucwecwa kwe-cathode embozwe okokunamathela, imiphumela elimazayo, ipayipi lensimbi eligqitshiwe ukuze kusetshenziswe isivikelo esingcono kakhulu esikhethiwe sokuvikela i-cathodic (i-3PE coating, ukuhlanganisa okuyisisekelo okuhlanganiswe i-epoxy powder) ngaphandle kwezizathu okufanele zihlolwe. Mayelana namandla okuvikela angcono kakhulu. Ijika elingase libe khona ezifundweni zakwamanye amazwe zifunda ukugqwala nezimo zokuvikela i-cathodic, amandla amakhulu okusabela kwe-hydrogen desorption engu-1.15V. Ngokophenyo lwase-Malaysia, Irejista ka-Lloyd, i-Shell inikeza amandla okuvikela aphezulu we-1.1V umkhawulo wokuthatha-1.15V; Izinga lesiJalimane le-DIN30676-19853.1 lifundeka kanje: ku-coating elincanyana (<1mm) eliwugqinsi lalisetshenziselwa ukuvikela ukugqwala kwekesi, ngenxa ye-polarization izoba nomthelela ophambene njengamabhamuza akhiwe, ukuze kuncishiswe umthelela, kufanele kukhawulelwe ububanzi bamandla okuvikela njengomsebenzi wokumboza, njengamandla okuvikela aphezulu -1.00 ~~-1.20V (i-CSE ehlobene) . Kwamanye amazwe, kukhulunywe ngokukhethekile ngembangela engaba khona yokwehluleka kokunamathela ngezinto eziningi, okuhlanganisa ukwakheka kwenhlabathi, umswakama, izinga lokushisa, izinhlobo zokumboza, ikhwalithi yokunamathela kanye ne-microbial, isakhi sofuzo sembonini.ralkucatshangelwa ukugwema ukunqamuka kukagesi okungase kube khona ukulahleka -1.05 ~ – 1.10V (CSE) (Qaphela: ukusetshenziswa okusabalele kwe-fusion bonded epoxy powder coating). I-Cathodic protection lead coating (i-3PE emboza ngezansi kumshini we ukuhlanganiswa okuhlanganisiwe kwe-epoxy powder coating).

Uhlobo lwe-coating, umswakama, izinga lokushisa linquma ukumbozwa kokumuncwa kwamanzi, ukumelana nekhono lokungena emsebenzini wokushuba nokumboza ngaphansi kwezimo ezifanayo. Ucwaningo luye lwabonisa ukuthi i-epoxy resin exhunywe ngokuphambana izokwakha inani elithile le-pore nemigudu yama-pore kuma-molecule wamanzi ku-epoxy resin. Isixazululo sifinyelela i-coating / metal interface, kusukela emhubheni ukuya efilimu yomkhiqizo wokugqwala okukhiqizwa esibonakalayo nokusabela kwensimbi, lolu ungqimba lwefilimu yomkhiqizo wokugqwala ukuvimbela ukusabela kwensimbi nesixazululo, ukumelana nokwemboza kuncipha kancane kancane. Ngokukhula kwama-ion abolayo afinyelela esibonakalayo, lolu ungqimba lwefilimu yomkhiqizo ogqwalile lucekelwa phansi kancane kancane, ukugqwala kuqiniswe, futhi ekugcineni kuphumele ekukhishweni koqweqwe lwe-epoxy esigubhu. I-Fusion bonded epoxy powder coatings ephulukisiwe isacebile ngamaqembu e-ether kanye ne-hydroxyl, la maqembu asebenzayo kanye nendawo yepayipi ehlanganiswe ngokuqinile ngamabhondi amakhemikhali ukuze kwakhe ukunamathela kokubola. Gcwalisa umlomo we-coating, aminyene, izizathu ze-pinhole, i-coating ingamazinga ahlukene okumuncwa kwamanzi kanye nokungena kwamanzi, uma ukuvikelwa kwe-cathodic kudlulele, okuholela ekuziphendukeleni kwe-cathodic hydrogen, nama-athomu e-hydrogen asebenzayo anqwabelene, ngezinga elithile. , i-hydrogen izoba ne-ether kanye ne-hydroxyl reaction, ngaleyo ndlela yehlise amandla ebhondi e-coating kanye nepayipi lensimbi, okuholela ekushabalaleni kwamandla ebhondi. Umphumela uba ukuthi enamathela off ipayipi steel.