E like me kā mākou e ʻike nei, ma waena o nā papa o ka mea hoʻololi wela pā, he mea kūikawā ka papa titanium no kona kūpaʻa maikaʻi loa i ka pala. A i ke koho ʻana o ka gasket, ua kaulana ka viton gasket no kona kūpaʻa ʻana i ka waikawa a me ka alkali a me nā kemika ʻē aʻe. No laila hiki ke hoʻohana pū ʻia lākou e hoʻomaikaʻi i ke kūpaʻa pala o ka mea hoʻololi wela pā?
ʻO kaʻoiaʻiʻo, ʻaʻole hiki ke hoʻohana pū ʻia ka papa Titanium a me ka viton gasket. Akā no ke aha? ʻO ke kumumanaʻo pale ʻana i ka pala o ka papa 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 ʻili pale titanium oxide mānoanoa ma luna o ka ʻili, hiki ke hana koke ʻia kēia papa o ka ʻili oxide i loko o kahi e loaʻa ai ka oxygen ma hope o ka luku ʻia ʻana. A ʻae kēia i ka luku ʻia ʻana a me ka hoʻoponopono ʻana (repassivation) o ka ʻili oxide e mālama ʻia i kahi kūlana paʻa, e pale ana i nā mea titanium i loko mai ka luku hou ʻia ʻana.
He kiʻi maʻamau o ka palaho lua
Eia nō naʻe, i ka wā e hoʻokomo ʻia ai ka metala titanium a i ʻole ka alloy i loko o kahi e loaʻa ai ka fluorine, ma lalo o ka hana a nā ion hydrogen i loko o ka wai, hana nā ion fluoride mai ka viton gasket me ka titanium metala e hana i ka fluoride soluble, kahi e hana ai i ka titanium pitting. Penei ke ʻano o ka hopena:
Ti2O3+ 6HF = 2TiF3+ 3H2O
TiO2+ 4HF = TiF4+ 2H2O
TiO2+ 2HF = TiOF2+ H2O
Ua ʻike ʻia nā noiʻi i loko o kahi hopena waikawa, ke hiki aku ka nui o ka ion fluoride i 30ppm, hiki ke luku ʻia ke kiʻi ʻokikene ma luna o ka ʻili titanium, e hōʻike ana ʻoiai inā he haʻahaʻa loa ka nui o ka ion fluoride e hōʻemi nui i ke kūpaʻa ʻana o ka corrosion o nā papa titanium.
Ke hoʻohana ʻole ʻia ka titanium oxide i ka pale ʻana o ka titanium oxide i loko o kahi ʻano corrosive e loaʻa ana ka hydrogen, e hoʻomau ka titanium i ka omo ʻana i ka hydrogen, a laila hana ʻia ka hopena REDOX. A laila hoʻoulu ʻia ʻo TiH2 ma luna o ka ʻili kristal titanium, e hoʻolalelale i ka corrosion o ka papa titanium, e hana ana i nā māwae a alakaʻi i ka leakage o ka mea hoʻololi wela papa.
No laila, ʻaʻole pono e hoʻohana pū ʻia ka papa titanium a me ka viton gasket i loko o ka mea hoʻololi wela pālahalaha, inā ʻaʻole e alakaʻi ia i ka pala a me ka hāʻule ʻana o ka mea hoʻololi wela pālahalaha.
Loaʻa i ka Shanghai Heat Transfer Equipment Co., Ltd. (SHPHE) ka ʻike lawelawe nui i ka ʻoihana hoʻololi wela pālahalaha, a he mau keʻena hoʻokolohua kino a me ke kemika pili pū kekahi, hiki ke hoʻoholo koke a pololei i ka mea o ka pālahalaha a me ka gasket no nā mea kūʻai aku i ke kahua mua o ke koho ʻana, e hōʻoia i ka hana palekana a hilinaʻi hoʻi o nā lako.
Ka manawa hoʻouna: Pepeluali-17-2022