Galvanizing
Halaye:
Zinc yana da ɗan kwanciyar hankali a cikin busasshiyar iska kuma ba shi da sauƙin canza launi. A cikin ruwa da yanayi mai laushi, yana amsawa tare da oxygen ko carbon dioxide don samar da oxide ko alkaline zinc carbonate fina-finai, wanda zai iya hana zinc daga ci gaba da oxidize da samar da kariya.
Zinc yana da saurin kamuwa da lalata a cikin acid, alkalis, da sulfides. Tsarin galvanized gabaɗaya yana buƙatar sha maganin wucewa. Bayan passivation a cikin chromic acid ko chromate bayani, da kafa passivation fim ba a sauƙi fallasa zuwa danshi iska, ƙwarai inganta anti-lalata ikon. Don sassan bazara, sassa na bakin ciki (kaurin bango <0.5m), da sassan ƙarfe waɗanda ke buƙatar ƙarfin injina, dole ne a aiwatar da cirewar hydrogen, yayin da sassan jan ƙarfe da jan ƙarfe na ƙarfe na iya buƙatar cire hydrogen.
Galvanizing yana da ƙananan farashi, sauƙin sarrafawa, da tasiri mai kyau. Matsakaicin yuwuwar tutiya yana da in mun gwada da kyau, don haka rufin zinc shine rufin anodic don ƙarfe da yawa.
Galvanization ana amfani dashi sosai a yanayin yanayi da sauran wurare masu kyau. Amma bai dace da amfani da shi azaman ɓangaren juzu'i ba.
Cchrome plating
Halaye: Ga sassan da ke haɗuwa da yanayin teku ko ruwan teku, kuma a cikin ruwan zafi sama da 70℃, Cadmium plating ne in mun gwada da barga, yana da karfi lalata juriya, mai kyau lubrication, kuma narke sannu a hankali a cikin tsarma hydrochloric acid, amma sosai mai narkewa a cikin nitric acid kuma insoluble a alkali. Oxidensa kuma ba ya narkewa a cikin ruwa. Shafi na Cadmium ya fi tutiya mai laushi, tare da ƙarancin haɓakar hydrogen da mannewa mai ƙarfi.
Bugu da ƙari, a ƙarƙashin wasu yanayi na electrolytic, murfin cadmium da aka samu yana da kyau fiye da suturar zinc. Amma iskar da cadmium ke samarwa a lokacin narkewa yana da guba, kuma gishirin cadmium mai narkewa shima guba ne. A karkashin yanayi na al'ada, cadmium yana aiki a matsayin suturar cathodic akan karfe kuma a matsayin murfin anodic a cikin teku da yanayin zafi mai zafi.
Ana amfani da shi ne musamman don kare sassa daga gurɓacewar yanayi da ruwan teku ko makamancin maganin gishiri ke haifarwa, da kuma tururi mai cike da ruwan teku. Yawancin sassa a cikin masana'antun jiragen sama, na ruwa, da na lantarki, maɓuɓɓugan ruwa, da sassa masu zare ana lulluɓe da cadmium. Ana iya goge shi, phosphated, kuma a yi amfani da shi azaman tushen fenti, amma ba za a iya amfani da shi azaman kayan aiki ba.
Chromium plating
halaye:
Chromium yana da karko sosai a cikin yanayi mai ɗanɗano, alkaline, acid nitric, sulfide, carbonate mafita, da Organic acid, kuma yana da sauƙi mai narkewa a cikin hydrochloric acid da sulfuric acid mai zafi. A ƙarƙashin aikin kai tsaye, idan Layer na chromium yana aiki azaman anode, yana da sauƙin narkewa a cikin bayani na soda caustic.
Layer na chromium yana da mannewa mai ƙarfi, babban taurin, 800-1000V, juriya mai kyau, ƙarfin haske mai ƙarfi, da juriya mai zafi. Ba ya canza launi ƙasa da 480℃, fara oxidize sama da 500℃, kuma yana rage taurin sosai a 700℃. Rashin lahanta shi ne cewa chromium yana da wuya, gaggautsa, kuma mai saurin rabuwa, musamman lokacin da aka yi masa canjin tasiri. Kuma yana da porosity.
Karfe na Chromium yana da saurin wucewa a cikin iska, yana haifar da samuwar fim ɗin wucewa kuma don haka canza yuwuwar chromium. Sabili da haka, chromium ya zama suturar cathodic akan ƙarfe.
Ba shi da kyau a yi amfani da plating na chrome kai tsaye a matsayin Layer anti-corrosion a saman sassan karfe. Gabaɗaya, Multi-Layer electroplating (watau tagulla plating→nickel plating→chromium plating) ana buƙatar don cimma manufar tsatsa
rigakafi da ado. A halin yanzu ana amfani da ko'ina don haɓaka juriya na ɓarna, gyare-gyaren girma, haskaka haske, da hasken ado na ado.
Sanya nickel
halaye:
Nickel yana da kwanciyar hankali mai kyau na sinadarai a cikin yanayi da kuma maganin alkaline, ba shi da sauƙi a canza launin, kuma yana da oxidized kawai a yanayin zafi sama da 600.° C. Yana narkewa a hankali a cikin sulfuric acid da hydrochloric acid, amma yana iya narkewa cikin sauƙi a cikin nitric acid. Yana da sauƙin wucewa a cikin nitric acid mai tattarawa don haka yana da kyakkyawan juriya na lalata.
Nickel plating yana da babban taurin, yana da sauƙin gogewa, yana da haske mai haske, kuma yana iya ƙara ƙayatarwa. Rashin hasara shi ne cewa yana da porosity. Don shawo kan wannan rashin amfani, ana iya amfani da suturar ƙarfe masu yawa, tare da nickel a matsayin matsakaicin matsakaici.
Nickel shine rufin cathodic don baƙin ƙarfe da murfin anodic don jan karfe.
An fi amfani da shi don kare kayan ado na ado don hana lalata da kuma ƙara kayan ado. Sanya nickel a kan samfuran tagulla yana da kyau don rigakafin lalata, amma saboda yawan darajar nickel, ana amfani da alluran tin tagulla a maimakon sanya nickel.
Lokacin aikawa: Nuwamba-14-2024
