Aia nā ʻano mechanical, kemikala, a me ka electrochemical e hoʻoneʻe ai i ka pālākiō oxide o nā paipu kila stainless sanitary.

Ma muli o ka paʻakikī o ka haku mele ʻana o nā paipu kila kila maʻemaʻe, ʻaʻole maʻalahi ka wehe ʻana i ka unahi oxide ma ka ʻili, akā e hoʻonui i ka ʻili i kahi kiʻekiʻe o ka maʻemaʻe a me ka maʻalahi.ʻO ka wehe ʻana i ka unahi oxide ma nā paipu kila kila maʻemaʻe, ʻelua mau ʻanuʻu, ʻo ka hoʻomaʻamaʻa mua ʻana, a ʻo ka hana ʻelua ka wehe ʻana i ka lehu a me ka slag.

ʻO ka hoʻomaʻamaʻa mua ʻana o ka paipu kila kila maʻemaʻe i ka unahi oxide e nalowale ka unahi oxide, a laila maʻalahi ka wehe ʻana ma ka pickling.Hiki ke hoʻokaʻawale ʻia ka hoʻomaʻamaʻa mua ʻana i kēia mau ʻano: alkaline nitrate melting method treatment.ʻO ka hoʻoheheʻe alkaline he 87% hydroxide a me 13% nitrate.Pono e mālama pono ʻia ka lakio o nā mea ʻelua i loko o ka paʻakai hoʻoheheʻe ʻia i loaʻa i ka paʻakai hoʻoheheʻe ka mana oxidizing ikaika loa, ka helu heheʻe, a me ka viscosity liʻiliʻi.I ke kaʻina hana, ʻaʻole emi ka sodium nitrate ma lalo o 8% (wt).Hana ʻia ka mālama ʻana i loko o ka umu ʻauʻau paʻakai, ʻo ka mahana he 450 ~ 470℃, a ʻo ka manawa he 5 mau minuke no ke kila kuhili ʻole ferritic a me 30 mau minuke no ke kila kuhili ʻole austenitic.Pēlā nō, hiki ke hoʻoheheʻe ʻia nā ʻokikene hao a me nā spinel e nā nitrates a lilo i mau ʻokiki hao trivalent, i maʻalahi ke wehe ʻia e ka pickling.Ma muli o ka hopena wela kiʻekiʻe, ua ʻoki ʻia nā oxides i ʻike ʻia i kahi ʻāpana a komo i loko o ka ʻauʻau ma ke ʻano o ka sludge.Ka lalo o ka umu.

Kaʻina hoʻoheheʻe alkaline nitrate ma mua o ka hoʻoheheʻe ʻana i ka mahu→hoʻomehana mua (150~250℃, manawa 20~30min)→lapaʻau paʻakai hoʻoheheʻe→wai kinai→holoi wai wela.ʻAʻole kūpono ka mālama ʻana i ka paʻakai i hoʻoheheʻe ʻia no nā hui me nā lua weld a i ʻole crimping.Ke lawe ʻia nā ʻāpana mai loko mai o ka umu paʻakai hoʻoheheʻe ʻia a hoʻopau ʻia ka wai, e pīpī ʻia kahi alkali a me ka noe paʻakai, no laila pono e hoʻohana ʻia ke ʻano dona hohonu no ka kinai ʻana i ka wai.pahu hoʻopaʻa wai ʻaʻole paʻipaʻi.Ke kinai wai, e huki mua i ka hīnaʻi ʻāpana i loko o ka pahu, kū ma luna o ka ʻili ākea, e pani i ka uhi pahu, a laila e hoʻohaʻahaʻa i ka hīnaʻi ʻāpana i loko o ka wai a hiki i ka wai.

ʻO ka hoʻomaʻamaʻa mua ʻana o ka potassium permanganate: ʻo ka hopena lapaʻau ka sodium hydroxide 100→125g/L, sodium carbonate 100→125g/L, potassium permanganate 50g/L, wela wela 95~105℃, ka manawa lapaʻau 2 ~ 4 hola.ʻOiai ʻaʻole maikaʻi ka mālama ʻana i ka alkaline potassium permanganate e like me ka mālama ʻana i ka paʻakai hoʻoheheʻe ʻia, ʻo kona pōmaikaʻi ʻo ia ka mea kūpono no nā hui me nā wili welded a i ʻole crimping.

No ka wehe 'ana i ka unahi oxide, ua ho'ohana pololei 'ia ka 'akika ikaika ma lalo nei no ka ho'oma'ama'a mua 'ana ma ke 'ano o ka lu'u 'ana.

No ka pale ʻana i ka ʻakika mai ka hoʻoheheʻe ʻana i ka metala kumu, pono e mālama pono ʻia ka manawa hoʻoinu a me ka mahana waika.