1.Ukuphuculwa kwendlela yokucoca ngoomatshini3PE anti-corrosion ukutyabeka
① Fumana okanye uphuhlise izixhobo zokufudumeza ezingcono zokutshintsha itotshi yokusika igesi. Izixhobo zokufudumeza kufuneka zikwazi ukuqinisekisa ukuba indawo yomlilo yokutshiza inkulu ngokwaneleyo ukufudumeza yonke inxalenye yokugquma ukuze ixotyulwe ngexesha elinye, kwaye kwangaxeshanye uqinisekise ukuba ubushushu bomlilo bungaphezulu kwama-200 ° C.
② Fumana okanye wenze isixhobo esingcono sokuhluba endaweni yefotsholo esicaba okanye ihamile yesandla. Isixhobo sokuxobula kufuneka sikwazi ukufezekisa intsebenziswano entle nomphezulu wangaphandle wombhobho, zama ukukhuhla i-anti-corrosion coating kumphezulu ongaphandle wombhobho ngexesha elinye, kwaye uqinisekise ukuba i-anti-corrosion coating idityaniswe kukuxobula. isixhobo kulula ukucoca.

I-2.I-Electrochemical peeling ye-3PE i-anti-corrosion coating
Uyilo lobunjineli kunye nabasebenzi bokwakha banokuhlalutya oonobangela bomhlwa wangaphandle werhasi engcwatywe imibhobho kunye neziphene ze-3PE anti-corrosion coating, kwaye bafumane iindlela ezintsha zokutshabalalisa kunye nokuxobula i-anti-corrosion coating.
(1) Izizathu zokubola kwangaphandle kwemibhobho kunye nohlalutyo lwe-3PE anti-corrosion coating defects
① Ulahleko lwangoku lwemibhobho engcwatyiweyo
I-Stray current ikhoyo ngoku eyenziwa yimpembelelo yeemeko zangaphandle, kwaye amandla ayo ngokuqhelekileyo alinganiswa ngendlela ye-polarization probe [1]. I-Stray current inobunzulu be-corrosion enkulu kunye nobungozi, uluhlu olubanzi kunye ne-randomness enamandla, ngakumbi ubukho bokutshintshana kwangoku kunokubangela ukuchithwa kwe-electrode surface kunye nokunyusa ukubola kwemibhobho. Ukuphazamiseka kwe-AC kunokukhawulezisa ukuguga kwe-anti-corrosion layer, kubangela ukuba i-anti-corrosion layer ixobuke, iphazamise ukusebenza okuqhelekileyo kwenkqubo yokukhusela i-cathodic, ukunciphisa ukusebenza kwangoku kwe-anode yedini, kwaye kubangele ukuba umbhobho ungafumani. ukhuseleko olusebenzayo lokuchasa umhlwa.
② Ukonakala kokusingqongileyo komhlaba kwimibhobho engcwatyiweyo

Ezona mpembelelo ziphambili zomhlaba ojikelezileyo ekudlekeni kwemibhobho yerhasi engcwatyiweyo zezi: a. Impembelelo yeebhetri eziphambili. Iiseli zeGalvanic ezenziwe yi-electrochemical inhomogeneity yesinyithi kunye nemidiya yimbangela ebalulekileyo yokubola kwimibhobho engcwatywe. b. Impembelelo yesiqulatho samanzi. Umxholo wamanzi unempembelelo enkulu kwi-corrosion ye-gas pipelines, kwaye amanzi emhlabeni yimeko efunekayo kwi-ionization kunye nokuchithwa kwe-electrolyte yomhlaba. c. Isiphumo sokuxhathisa. Okukhona kuncinci ukuxhathisa umhlaba, kokukhona ukomelela kwimibhobho yentsimbi. d. Isiphumo se-asidi. Imibhobho igqwala ngokulula kwimihlaba eneasidi. Xa umhlaba uqulethe i-asidi eninzi ye-organic, nokuba ixabiso le-pH lisondele kwi-neutral, liyingozi kakhulu. e. Isiphumo setyuwa. Ityuwa emhlabeni ayidlali kuphela indima kwi-conductive process ye-corrosion yomhlaba, kodwa iphinda ithathe inxaxheba kwi-chemical reactions. Umahluko woxinzelelo lwetyuwa yebhetri eyenziwe luqhagamshelwano phakathi kombhobho werhasi nomhlaba onoxinzelelo olwahlukileyo lwetyuwa ibangela ukudleka kombhobho okwindawo enoxinzelelo olukhulu lwetyuwa kwaye yenza umhlwa wengingqi ube mandundu. f. Impembelelo ye-porosity. I-porosity yomhlaba enkulu inceda ekungeneni kwe-oksijini kunye nokugcinwa kwamanzi emhlabeni, kwaye ikhuthaza ukwenzeka kwe-corrosion.

③ Uhlalutyo lwesiphene lwe-3PE yokunamathela kwi-anti-corrosion [5]
Into ebalulekileyo echaphazela ukubambelela phakathi kwe-3PE ye-anti-corrosion coating kunye nombhobho wensimbi ngumgangatho wonyango ongaphezulu kunye nokungcoliswa komphezulu wombhobho wensimbi. a. Umphezulu umanzi. Umphezulu wombhobho wensimbi emva kokuchithwa ungcolisekile ngamanzi kunye nothuli, oluxhomekeke kwi-rust ejikelezayo, eya kuchaphazela ukunamathela phakathi kwe-sintered epoxy powder kunye nomphezulu wepayipi yensimbi. b. Ukungcoliswa kothuli. Uthuli olomileyo emoyeni luwela ngokuthe ngqo phezu kombhobho wensimbi okhutshwe ngumhlwa, okanye uwela kwisixhobo sokuhambisa kwaye emva koko ungcolise ngokungathanga ngqo umphezulu wepayipi yensimbi, enokubangela ukuncipha kokubambelela. c. Iipores kunye namaqamza. Iipores ezibangelwa ukufuma zikhona ngokubanzi kumphezulu kunye nangaphakathi kwi-HDPE layer, kwaye ubukhulu kunye nokusabalalisa zifana ngokufanayo, ezichaphazela ukunamathela.
(2) Iingcebiso zokuhluthwa kwe-electrochemical ye-3PE anti-corrosion coatings
Ngokuhlalutya izizathu zokuduka kwangaphandle kwemibhobho yerhasi engcwatywe kunye neziphene zokuncamathela ze3PE anti-corrosion coatings, ukuphuhliswa kwesixhobo esisekwe kwiindlela ze-electrochemical yindlela elungileyo yokusombulula ngokukhawuleza ingxaki yangoku, kwaye akukho sixhobo sinjalo. kwimarike ngoku.
Kwisiseko sokuqwalasela ngokupheleleyo iipropati ezibonakalayo ze-3PE anti-corrosion coating, ngokufunda indlela yokubola komhlaba kunye nemifuniselo, indlela yokubola kunye nesantya somhlwa esikhulu kakhulu kuneso somhlaba siyaphuhliswa. Sebenzisa ukusabela kweekhemikhali okuphakathi ukwenza iimeko ezithile zangaphandle, ukuze i-3PE ye-anti-corrosion i-coating isebenze kunye ne-electrochemical reagents, ngokonakalisa ukunamathela kwayo kunye nombhobho okanye ukunyibilikisa ngokuthe ngqo i-anti-corrosion coating.

3.I-Miniaturization ye-strippers yangoku enkulu

I-PetroChina West-East Gas Pipeline Inkampani iphuhlise isixhobo esibalulekileyo somatshini wokulungiswa ngokukhawuleza kweoli kunye negesi yendalo imibhobho yomgama omde - umbhobho omkhulu wangaphandle wokulwa nomatshini wokuhlutha umaleko. Izixhobo zixazulula ingxaki yokuba i-anti-corrosion layer inzima ukuyikhupha ekulungiseni ngokukhawuleza kwe-oyile-diameter kunye nemibhobho yegesi, echaphazela ukusebenza kakuhle kokulungiswa ngokukhawuleza. Umbhobho wokukrazula-uhlobo lombhobho omkhulu wangaphandle ochasene nomhlwa usebenzisa i-motor njengamandla okuhluba ukuqhuba ibrashi eqengqelekayo ukujikeleza ukususa umaleko ochasene nomhlwa osongelwe kudonga olungaphandle, kwaye uhambe ngesangqa kumphezulu. womaleko wokunqanda umhlwa wombhobho ukuze ugqibezele ukuxobula umaleko wokuchasa umbhobho. Imisebenzi ye-welding ibonelela ngeemeko ezifanelekileyo. Ukuba esi sixhobo esikhulu sincinci, sifanelekile kwimibhobho yangaphandle ye-diameter encinci kwaye iyathandwa, iya kuba neenzuzo ezingcono zoqoqosho kunye nentlalontle yokwakhiwa kwegesi engxamisekileyo yedolophu. Ukwenziwa mncinci njani umbhobho ongaphandle ochasene nomhlwa umbhobho ochasene nomhlwa licala elilungileyo lophando.