I-anti-corrosion epoxy powder coating idlala umsebenzi wokukhusela

Ukusetyenziswa okuhlangeneyo kokukhusela i-cathodic kunye ne-corrosion layer yokukhusela, ivumela isakhiwo sesinyithi esingaphantsi komhlaba okanye ngaphantsi kwamanzi ukuze sifumane ukhuseleko olunoqoqosho kunye nolusebenzayo. Ngokuqhelekileyo ifakwe kwi-coating ekhuselayo ngaphambi kokusetyenziswa, kwi-metal kunye ne-dielectric environment isolation yokufakelwa kombane, i-coating elungileyo inokukhusela ngaphezu kwe-99% yezakhiwo zomphezulu wangaphandle kwi-corrosion. Umbhobho ukutyabeka kwimveliso, uthutho kunye nolwakhiwo, ayinakuqinisekisa ngokupheleleyo nxamnye nawuphi na umonakalo (gcwalisa umlomo ukutyabeka, ingxinano yokwambathisa, umngxuma ukutyabeka, njalo njalo), akunakwenzeka ukuba bume umbhobho yodwa ngokupheleleyo. Kodwa nakwi-anti-corrosion insulation layer yezixhobo ezahlukeneyo, ngamaqondo ahlukeneyo, i-absorbent kunye nokuphefumla, kwaye iya kungcwatywa ngokuthe ngcembe. Ukugcina i-anti-corrosion esebenzayo, kuyimfuneko ukuthatha ukukhuselwa kwe-cathodic oko kukuthi, ukukhuselwa ngokubambisana. Iingubo ezityebileyo (ukutyeba> 1mm), ukukhuselwa kombhobho odibeneyo kufuneka kukhethwe amandla okhuseleko we--1.10 ukuya ku-1.15V (CSE), i-coating ebhityileyo (ukutyeba ≤ 1mm) ithatha amandla okukhusela -1.05 ukuya ku-1.10V (CSE), Ukuthathela ingqalelo ukubunjwa komhlaba, ukufuma, ubushushu, iintlobo zokugquma, umgangatho wokugquma, kunye ne-microorganisms, uhlengahlengiso olufanelekileyo kumandla okukhusela, zombini ukukhusela umbhobho ngaphandle kokutshabalalisa i-anti-corrosion coating. Ukonakala kwendawo yovavanyo yangoku yepolarization kusebenza ngakumbi. "Ukukhuselwa" ngumbono obalulekileyo apha, ochasene ne-corrosion epoxy yengubo endaweni, “ukhuseleko”?

Ukuhluthwa kwecathode egqunyiweyo yokwaleka, iziphumo eziyonakalisayo, owona mbhobho wentsimbi ongcwatyiweyo wokwenene wokuqhuba olona khuselo lungcono olukhethiweyo lokwaleka lwecathodic (i-3PE yokwambathisa, udibaniso olusisiseko oludityaniswe nomgubo we-epoxy) ngaphandle kwezizathu ezifanele ukuphononongwa. Malunga neyona ndlela ibalaseleyo yokhuseleko. Igophe langoku elinokubakho kwiingcali zangaphandle zifunda ukubola kunye neemeko zokukhuselwa kwe-cathodic, ukusabela okukhulu kwe-hydrogen desorption ye-1.15V. Ngokophando lwaseMalaysia, iRejista kaLloyd, iShell ibonelela ngokhuseleko oluphezulu olunokubakho kwi-1.1V umda wokuthatha-1.15V; Umgangatho waseJamani i-DIN30676-19853.1 ifundeka ngolu hlobo lulandelayo: kwi-coating ebhityileyo (<1mm) etyebileyo yayisetyenziselwa ukukhuselwa komhlwa kwimeko, ngenxa ye-polarization iya kuba nempembelelo echaseneyo njengamadyunguza akhiwe, ukuze kuncitshiswe impembelelo, kufuneka umda ububanzi bekhono lokukhusela njengomsebenzi wokugquma, njengamandla okukhusela aphezulu -1.00 ~~-1.20V (i-CSE ehambelanayo) . Kwilizwe langaphandle, kukhankanyiwe ngokukodwa unobangela wokungaphumeleli kokutyabeka ngenani lezinto, kubandakanywa ukubunjwa komhlaba, ukufuma, ubushushu, iintlobo zokugquma, umgangatho wokugquma kunye ne-microbial, ijini yoshishino.ralngokucokisekileyo kuthathelwa ingqalelo ukuphepha ukungabikho kombane okunokubakho kulahleke -1.05 ~ – 1.10V (CSE) (Qaphela: ukusetyenziswa okuxhaphakileyo kwe-fusion bonded epoxy powder coating). Ukhuselo lweCathodic ilothe yokwambathisa (i-3PE yokwambathisa ezantsi kwindlela ye udibaniso oludityanisiweyo lwe-epoxy powder yokwambathisa).

Uhlobo lwe-Coating, ukufuma, ubushushu bumisela ukugquma kwamanzi, ukuchasana nesakhono sokungena kumsebenzi wobunzima bokugquma kunye nokugquma phantsi kweemeko ezifanayo. Uphando lubonise ukuba i-epoxy resin edibeneyo edibeneyo iya kwenza inani elithile le-pore kunye ne-pore channels ze-molecule zamanzi kwi-epoxy resin. Isisombululo sifikelele kwi-coating / interface yesinyithi, ukusuka kwitonela ukuya kwifilimu yemveliso enomhlwa eyenziwe kwi-interface kunye nempendulo yesinyithi, lo maleko wefilimu yemveliso ye-corrosion ukuthintela ukusabela kwesinyithi kunye nesisombululo, ukuxhathisa ukugquma kuyancipha ngokuthe ngcembe. Ngokwanda kwe-ion ezonakalisayo ezifikelela kujongano, lo maleko wefilim yemveliso yomhlwa utshatyalaliswa ngokuthe chu, umhlwa uyaqina, kwaye ekugqibeleni ubangele ukukhukuliswa kwe-epoxy kwigubu. I-Fusion edityanisiweyo yomgubo we-epoxy yokwambathisa enyangwayo isetyebile kumaqela e-ether kunye ne-hydroxyl, la maqela asebenzayo kunye nomphezulu wombhobho odityaniswe ngokuqinileyo kunye ngamabhondi ekhemikhali ukwenza i-anti-corrosion coating. Gcwalisa umlomo wokugquma, uxinene, izizathu zombhobho, ukugquma ngamanqanaba ahlukeneyo okufunxa kwamanzi kunye nokungena, ukuba ukhuseleko lwe-cathodic lugqithise, olukhokelela kwi-cathodic hydrogen evolution, kunye ne-athomu ye-hydrogen esebenzayo ye-athom eqokelelweyo, ukuya kwinqanaba elithile. , i-hydrogen iya ku-ether kunye ne-hydroxyl reaction, ngaloo ndlela ijongela phantsi amandla ebhondi ye-coating kunye nombhobho wensimbi, okubangelwa ukunyamalala kwamandla ebhondi. Isiphumo kukuba i-coating iphuma kumbhobho wensimbi.