Galvanizing
Halaye:
Zinc yana da ƙarfi sosai a cikin busasshiyar iska kuma ba ya canzawa cikin sauƙi. A cikin ruwa da muhalli mai danshi, yana amsawa da iskar oxygen ko carbon dioxide don samar da fim ɗin oxide ko alkaline zinc carbonate, wanda zai iya hana zinc ci gaba da yin oxidizing da samar da kariya.
Zinc yana da saurin kamuwa da tsatsa a cikin acid, alkalis, da sulfides. Gabaɗaya, layin galvanized yana buƙatar a yi masa maganin passivation. Bayan passivation a cikin chromic acid ko maganin chromate, fim ɗin passivation da aka samar ba ya fuskantar iska mai ɗan danshi cikin sauƙi, wanda ke ƙara ƙarfin hana tsatsa. Ga sassan bazara, sassan bango masu siriri (kauri na bango <0.5m), da sassan ƙarfe waɗanda ke buƙatar ƙarfin injina mai yawa, dole ne a cire hydrogen, yayin da sassan ƙarfe da ƙarfe ba za su buƙaci cire hydrogen ba.
Galvanization yana da ƙarancin farashi, sauƙin sarrafawa, da kuma kyakkyawan tasiri. Matsakaicin ƙarfin zinc yana da ɗan bambanci, don haka murfin zinc wani shafi ne na anodic ga ƙarfe da yawa.
Ana amfani da galvanization sosai a yanayin yanayi da sauran wurare masu kyau. Amma bai dace da amfani da shi azaman bangaren gogayya ba.
Cplating na hrome
Halaye: Ga sassan da suka taɓa yanayin teku ko ruwan teku, da kuma a cikin ruwan zafi sama da digiri 70℃, plating ɗin cadmium yana da ƙarfi sosai, yana da juriya ga tsatsa, yana da kyau wajen shafawa, kuma yana narkewa a hankali a cikin hydrochloric acid mai narkewa, amma yana narkewa sosai a cikin nitric acid kuma baya narkewa a cikin alkali. Hakanan oxide ɗinsa ba ya narkewa a cikin ruwa. Rufin Cadmium ya fi laushi fiye da murfin zinc, tare da ƙarancin hydrogen embrittle da ƙarfi a mannewa.
Bugu da ƙari, a wasu yanayi na electrolytic, murfin cadmium da aka samu ya fi kyau fiye da murfin zinc. Amma iskar gas da cadmium ke samarwa yayin narkewa yana da guba, kuma gishirin cadmium mai narkewa suma suna da guba. A ƙarƙashin yanayi na yau da kullun, cadmium yana aiki azaman murfin cathodic akan ƙarfe kuma azaman murfin anodic a cikin yanayin teku da yanayin zafi mai yawa.
Ana amfani da shi galibi don kare sassa daga tsatsawar yanayi da ruwan teku ko makamancin haka ke haifarwa, da kuma tururin ruwan teku mai cike da sinadarai. An lulluɓe sassa da yawa a masana'antar jiragen sama, na ruwa, da na lantarki, maɓuɓɓugan ruwa, da sassan zare da cadmium. Ana iya goge shi, a shafa shi da phosphate, sannan a yi amfani da shi azaman tushen fenti, amma ba za a iya amfani da shi azaman kayan aiki ba.
Rufin Chromium
halaye:
Chromium yana da ƙarfi sosai a cikin yanayi mai danshi, alkaline, nitric acid, sulfide, carbonate solutions, da kuma Organic acid, kuma yana narkewa cikin sauƙi a cikin hydrochloric acid da kuma sulfuric acid mai zafi mai ƙarfi. A ƙarƙashin aikin wutar lantarki kai tsaye, idan Layer ɗin chromium ya zama anode, yana narkewa cikin sauƙi a cikin maganin soda mai kauri.
Layer ɗin chromium yana da mannewa mai ƙarfi, tauri mai yawa, 800-1000V, juriyar lalacewa mai kyau, haske mai ƙarfi, da juriyar zafi mai yawa. Ba ya canza launi ƙasa da 480℃, yana fara yin oxidize sama da 500℃kuma yana rage tauri sosai a 700℃Rashin kyawunsa shine cewa chromium yana da tauri, yana da rauni, kuma yana iya rabuwa, musamman idan aka yi masa canjin nauyi. Kuma yana da porosity.
Sinadarin Chromium yana da saurin kamuwa da iska, wanda hakan ke haifar da samuwar fim ɗin passivation wanda hakan ke canza yuwuwar chromium. Saboda haka, chromium ya zama wani abu mai kama da cathodic a kan ƙarfe.
Bai dace a shafa faranti na chrome kai tsaye a matsayin wani Layer na hana tsatsa a saman sassan ƙarfe ba. Gabaɗaya, ana yin amfani da faranti na launuka daban-daban (misali faranti na tagulla)→farantin nickel→Ana buƙatar yin amfani da chromium plating) don cimma manufar tsatsa
rigakafi da ado. A halin yanzu ana amfani da shi sosai wajen inganta juriyar lalacewa ga sassa, gyara girma, haskaka haske, da kuma hasken ado.
Rufin nickel
halaye:
Nickel yana da kyakkyawan daidaiton sinadarai a cikin yanayi da kuma maganin alkaline, ba a canza launinsa cikin sauƙi ba, kuma ana yin oxidize ne kawai a yanayin zafi sama da 600° C. Yana narkewa a hankali a cikin sinadarin sulfuric da hydrochloric acid, amma yana narkewa cikin sauƙi a cikin sinadarin nitric acid mai narkewa. Yana da sauƙin shiga cikin sinadarin nitric acid mai yawa saboda haka yana da kyakkyawan juriya ga tsatsa.
Rufin nickel yana da tauri mai yawa, yana da sauƙin gogewa, yana da haske mai yawa, kuma yana iya ƙara kyau. Rashin kyawunsa shine yana da porosity. Don shawo kan wannan rashin amfani, ana iya amfani da rufin ƙarfe mai layuka da yawa, tare da nickel a matsayin matsakaicin Layer.
Nickel wani shafi ne na cathodic don ƙarfe da kuma shafi na anodic don jan ƙarfe.
Ana amfani da shi akai-akai don kare rufin ado don hana tsatsa da kuma ƙara kyawun gani. Rufin nickel da aka yi da kayayyakin jan ƙarfe ya dace da rigakafin tsatsa, amma saboda yawan ƙimar nickel, galibi ana amfani da ƙarfen tin na jan ƙarfe maimakon rubin nickel.
Lokacin Saƙo: Nuwamba-14-2024
