E like me kā mākou e ʻike ai, ma waena o nā papa o ka pā wela wela, ʻokoʻa ka pā titanium no kona kūpaʻa maikaʻi ʻana i ka corrosion. A i ke koho ʻana i ka gasket, kaulana ʻo viton gasket no ka pale ʻana i ka waikawa a me ka alkali a me nā mea ʻē aʻe. No laila hiki ke hoʻohana pū ʻia e hoʻomaikaʻi i ke kūpaʻa ʻana o ka pā wela wela?
ʻO ka ʻoiaʻiʻo, ʻaʻole hiki ke hoʻohana pū ʻia ka pā Titanium a me ka gasket viton. Akā, no ke aha? ʻO ia ke kumu o ka pale ʻana i ka corrosion o ka pā titanium ʻaʻole hiki ke hoʻohana pū ʻia nā mea ʻelua, no ka mea he maʻalahi ka papa titanium e hana i kahi papa o ka titanium oxide pale kiʻi ʻoniʻoni ma luna o ka ʻili, hiki ke hoʻokumu koke ʻia kēia papa kiʻi oxide i ka oxygen- kaiapuni ma hope o ka luku ʻana. A ʻae kēia i ka luku ʻana a me ka hoʻoponopono hou ʻana (repassivation) o ke kiʻi oxide e mālama ʻia i kahi kūlana paʻa, e pale ana i nā mea titanium i loko o ka luku hou ʻana.
ʻO ke kiʻi ʻānai lua maʻamau
Eia nō naʻe, i ka wā o ka titanium metala a i ʻole ka huila i loko o ke kaiapuni i loko o ka fluorine, ma lalo o ka hana a nā ion hydrogen i loko o ka wai, e hana nā ion fluoride mai ka gasket viton me ka titanium metala e hana i ka fluoride hiki ke hoʻoheheʻe ʻia, e hana ai ka titanium pitting. Penei ka hoohalike pane.
Ti2O3+ 6HF = 2TiF3+ 3H2O
TiO2+ 4HF = TiF4+ 2H2O
TiO2+ 2HF = TiOF2+ H2O
Ua ʻike nā haʻawina i loko o ka hopena acidic, i ka wā e hiki ai i ka 30ppm ka nui o ka ion fluoride, hiki ke luku ʻia ke kiʻi oxidation ma luna o ka ili titanium, e hōʻike ana ʻoiai inā he haʻahaʻa haʻahaʻa loa o ka fluoride ion e hōʻemi nui i ka pale ʻana o nā papa titanium.
I ka wa titanium metala me ka pale ole o ka titanium oxide, i loko o ka corrosive kaiapuni i loko o ka hydrogen o ka hydrogen evolution, titanium e hoʻomau i ka hydrogen, a me REDOX hopena. A laila hana ʻia ʻo TiH2 ma ka ʻili aniani titanium, ka mea e hoʻolalelale i ka corrosion o ka pā titanium, e hana ana i nā māwae a alakaʻi i ka leakage o ka pā wela wela.
No laila, ʻaʻole pono e hoʻohana pū ʻia i ka pā wela wela, titanium plate a me viton gasket, inā ʻaʻole ia e alakaʻi i ka corrosion a me ka hiki ʻole o ka pā wela wela.
ʻO Shanghai Heat Transfer Equipment Co., Ltd. (SHPHE) he waiwai lawelawe i ka ʻoihana hoʻololi ʻana i ka pā wela, a ua pili pū kekahi i nā laboratories kino a me kemika, hiki ke hoʻoholo koke i ka mea o ka pā a me ka gasket no nā mea kūʻai aku i ka wā mua o koho, e hōʻoia i ka palekana a me ka pono hana o na lako.
Ka manawa hoʻouna: Feb-17-2022