Ipayipi elifakwe ngogesi elishisayo

Insimbi encibilikisiwe ihlangana ne-matrix yensimbi ukuze ikhiqize ungqimba lwe-alloy, ukuze i-matrix kanye ne-coating kuhlanganiswe. I-hot dip galvanizing iwukuqala ngokukha ipayipi lensimbi, ukuze kususwe i-iron oxide ebusweni bepayipi lensimbi, ngemva kokukha, ngesisombululo samanzi se-ammonium chloride noma i-zinc chloride noma ithangi lesisombululo samanzi esixubile se-ammonium chloride kanye ne-zinc chloride ukuze kuhlanzwe, bese kufakwa ethangini le-hot dip plating. I-hot dip galvanizing inezinzuzo zokukhahlela okufanayo, ukunamathela okuqinile kanye nokuphila isikhathi eside. Iningi lezinqubo enyakatho lisebenzisa inqubo yokugcwalisa kabusha i-zinc yepayipi le-coil eliqondile le-galvanizing.

Ipayipi elibandayo elihlanganisiwe

I-cold galvanizing igesi kagesi, inani le-galvanizing lincane kakhulu, liyi-10-50g/m2 kuphela, ukumelana kwayo nokugqwala kuhluke kakhulu kunepayipi elishisayo le-galvanizing. Abakhiqizi bamapayipi avamile e-galvanizing, ukuze baqinisekise ikhwalithi, iningi labo alisebenzisi i-electric galvanizing (i-cold plating). Yilawo mabhizinisi amancane kuphela anemishini esidala asebenzisa i-electric galvanizing, vele, amanani awo ashibhile. Esikhathini esizayo, amapayipi abandayo e-galvanizing awavunyelwe ukusetshenziswa njengamapayipi amanzi negesi.

Ipayipi lensimbi elicwengekileyo elishisayo

Ukusabela okuyinkimbinkimbi ngokomzimba nangokwekhemikhali kwenzeka phakathi kwe-substrate yeshubhu lensimbi kanye nebhavu elincibilikisiwe ukuze kwakheke ungqimba oluqinile lwe-zinc-iron alloy olunokumelana nokugqwala. Ungqimba lwe-alloy luhlanganiswe nongqimba lwe-zinc oluhlanzekile kanye ne-matrix yepayipi lensimbi. Ngakho-ke, ukumelana kwalo nokugqwala kunamandla.

Ngemva kokuthuthukiswa kwepayipi lensimbi elishisayo elihlanganisiwe ngawo-1960 kuya ku-1970, ikhwalithi yomkhiqizo ithuthuke kakhulu, kusukela ngo-1981 kuya ku-1989 kwanikezwa uMnyango Wezensimbi Wemikhiqizo Esezingeni Eliphezulu kanye nomklomelo Wesiliva Kazwelonke, ukukhiqizwa nakho kwanda iminyaka eminingi, kusukela ngo-1993 kwakhiqizwa amathani angaphezu kuka-400,000, kusukela ngo-1999 kwakhiqizwa amathani angaphezu kuka-600,000, futhi kwathunyelwa emazweni aseNingizimu-mpumalanga ye-Asia, e-Afrika, e-United States, eJapane, eJalimane nasezifundeni. Amapayipi ahlanganisiwe ahlanganisiwe asetshenziswa kakhulu njengamapayipi amanzi namapayipi egesi, kanti imininingwane evamile ingu-+12.5~+102 mm. Ngemva kweminyaka yawo-1990, ngenxa yokunaka kukahulumeni ekuvikeleni imvelo, ukulawulwa kwamabhizinisi angcolisa kakhulu kuya ngokuya kuba nzima, "imfucuza emithathu" ekhiqizwa ekukhiqizweni kwamapayipi agqunywe ngokushisa kunzima ukuyixazulula, okuhambisana nokuthuthukiswa okusheshayo kwamapayipi agqunywe ngokushisa ngensimbi engagqwali, amapayipi e-PVC namapayipi ahlanganisiwe, kanye nokuthuthukiswa okusheshayo kwamapayipi okwakha amakhemikhali, ukusetshenziswa kwamapayipi ensimbi agqunywe ngokushisa kuyavinjelwa, okwenza ukuthuthukiswa kwamapayipi agqunywe ngokushisa agqunywe ngokushisa kuye kwathinteka kakhulu. Ukuqina kanye nomkhawulo, ipayipi eligqunywe ngokushisa eligqunywe ngokushisa kamuva lathuthuka kancane kancane.

Ipayipi lensimbi elibandayo elihlanganisiwe

Ingqimba ye-zinc iyisimbozo sikagesi, kanti ungqimba lwe-zinc luhlanganiswe ngokuzimela nge-matrix yepayipi lensimbi. Ingqimba ye-zinc incane, kanti ungqimba lwe-zinc lumane lunamathele ku-matrix yepayipi lensimbi futhi kulula ukuwa. Ngakho-ke, ukumelana kwayo nokugqwala akukuhle. Ezakhiweni ezintsha zokuhlala, akuvunyelwe ukusebenzisa amapayipi ensimbi abandayo agqunywe ngamapayipi okuhambisa amanzi.