Izindlela ezijwayelekile zokwelashwa okumnyama kwensimbi engenasici

Isimiso: Ngokwelashwa kwamakhemikhali, ungqimba lwefilimu le-oxide ekhiqizwa endaweni yensimbi, futhi ukwelashwa okungaphezulu kutholakala ngefilimu le-oxide. Isimiso esisetshenziswe kule nqubo yokwelashwa engaphezulu yokwakha i-oxide film endaweni yensimbi ngaphansi kwesenzo semishini ehambisanayo, engahlukanisa insimbi ekutholeni okuqondile nemvelo yangaphandle.

Izindlela ezijwayelekile zensimbi engenacala zimi ngokulandelayo:

Isigaba 1: Indlela yokufaka imibala ye-acid

(1) Indlela Ebilisiwe ye-Dichromate. Izitho zensimbi ezingagqwali ezingenasici ku-molten sodium dichromate solution futhi zivuse kahle imizuzu engama-20-30 ukwakha ifilimu elimnyama le-oxide. Susa futhi upholile, bese uhlanza ngamanzi.

(2) I-Chromate Black Chemical Oxidation indlela. Inqubo yokuguqulwa kombala kwale nyandla yefilimu isuka ekukhanyeni kuya kobumnyama. Lapho kuguquka kusuka ku-Light Blue ku-Deep Blue (noma umnyama omsulwa), isikhathi sokuphumula singu-0.5-1. Uma leli phuzu elifanele liphuthelwe, lizobuyela ku-brown akhanyayo futhi lingasuswa kuphela futhi lihlanganiswe nemibala.

2. Indlela ye-Vulcanization ingathola ifilimu emnyama emnyama, edinga ukuthathwa nge-aqua regia ngaphambi kwe-oxidation

3. Indlela ye-Alkala ye-Oxidation. I-Alkalaline Oxidation yisixazululo esilungiselelwe nge-sodium hydroxide, nesikhathi se-oxidation semizuzu engu-10-16. Ifilimu emnyama ye-oxide inokuvimbela okuhle futhi ayidingi ukwelashwa kwelapha. Isikhathi sokufafaza usawoti ngokuvamile siphakathi kwamahora angama-600-800. Kungagcina ikhwalithi enhle yensimbi engenasici ngaphandle kokugqwala.

Isigaba 2: Indlela ye-electrolytic oxidation

Ukulungiselela kwesisombululo: (20- 40g / l Dichromate, 10-40g / l Manganese Sulfate, 10-20g / L BORIC acid, 10-20g / l / ph3-4). Ifilimu elinemibala lalifakwe kukhambi le-10% le-HCL ngo-25c imizuzu emi-5, futhi kwakungekho ukuguqulwa kombala noma ukuncipha kwesendlalelo sefilimu yangaphakathi, okubonisa ukumelana nokugqwala okuhle kwesendlalelo sefilimu. Ngemuva kwe-elecctrolysis, insimbi ye-1Cr17 ye-Ferritic yensimbi emnyama imnyama ngokushesha, wabe eselukhuni ukuthola ifilimu elimnyama le-oxifomu ngombala ofanayo, ukuqina, kanye nobulukhuni obuthile. Izici ziyinqubo elula, isivinini esimnyama esisheshayo, umphumela omuhle wokufaka imibala, kanye nokuphikiswa okuhle kokugqwala. Ilungele ukwelashwa okubangelwa yindawo yama-steren ahlukahlukene futhi ngenxa yalokho kunenani elisebenzayo elisebenzayo.

Isigaba 3: I-QPQ Heat Treatment indlela

Kwenziwe ngemishini ekhethekile, ungqimba lwefilimu luqinile futhi lunokumelana okuhle kokuvimbela; Kodwa-ke, ngenxa yeqiniso lelo nsimbi engenacala, ikakhulukazi insimbi engenacala, ayinakhono elifanayo lokuvimbela ukwelashwa njengaphambi kokwelashwa kwe-QPQ. Isizathu ukuthi okuqukethwe kwe-chromium ebusweni bensimbi e-autenitic engagqwali kulimele. Ngoba kwinqubo eyedlule ye-QPQ, okuyinqubo ye-nitriding, okuyinqubo yekhabhoni ne-nitrogen izongena ngaphakathi, idala ukulimala kwesakhiwo sesakhiwo esingaphezulu. Kulula ukugqwala, isifutho sikasawoti mpofu siyogqwala kuphela emahoreni ambalwa. Ngenxa yalokhu kubuthakathaka, ukusebenza kwayo kunqunyelwe.