ʻO ke koho ʻana i ka lāʻau lapaʻau kahi pilikia e kū nei kēlā me kēia mea hoʻolālā. Nui nā ʻano o nā koho lapaʻau ili i loaʻa, a ʻaʻole pono ka mea hoʻolālā kiʻekiʻe e noʻonoʻo i ka hoʻokele waiwai a me ka pono o ka hoʻolālā, akā e hoʻolohe pū i ke kaʻina hana a me nā koi kaiapuni. Aia ma lalo iho kahi hoʻolauna pōkole i kekahi mau uhi hoʻohana maʻamau no nā mea hoʻopaʻa e pili ana i nā loina i luna, no ka ʻike ʻana e nā loea hoʻopaʻa.
1. Electrogalvanizing
ʻO Zinc ka mea i hoʻohana pinepine ʻia no nā mea hoʻopaʻa kālepa. Maikaʻi ke kumukūʻai, a maikaʻi ke ʻano. ʻO nā kala maʻamau ka ʻeleʻele a me ka ʻōmaʻomaʻo koa. Eia naʻe, ʻo kāna hana anti-corrosion he awelika, a ʻo kāna hana anti-corrosion ka haʻahaʻa loa ma waena o nā papa zinc plating (coating). ʻO ka maʻamau, hoʻokō ʻia ka hoʻāʻo ʻana o ka paʻakai paʻakai kūʻokoʻa o ke kila galvanized i loko o 72 mau hola, a hoʻohana pū ʻia nā mea hoʻopaʻa sila kūikawā e hōʻoia i ka lōʻihi o ka hoʻāʻo ʻana o ka paʻakai paʻakai ma mua o 200 mau hola. Eia nō naʻe, he pipiʻi ke kumukūʻai, ʻo ia ka 5-8 mau manawa o ke kila galvanized maʻamau.
ʻO ke kaʻina hana o ka electrogalvanizing hiki i ka hydrogen embrittlement, no laila ʻaʻole mālama ʻia nā bolts ma luna o ka papa 10.9 me ka galvanizing. ʻOiai hiki ke hoʻoneʻe ʻia ka hydrogen me ka umu ma hope o ka hoʻopili ʻana, e pōʻino ke kiʻi passivation i nā mahana ma luna o 60 ℃, no laila pono e lawe ʻia ka wehe ʻana o ka hydrogen ma hope o ka electroplating a ma mua o ka passivation. He maikaʻi ʻole ka hana a me nā kumukūʻai hoʻoili kiʻekiʻe. I ka ʻoiaʻiʻo, ʻaʻole hoʻopau nā mea kanu hana maʻamau i ka hydrogen ke ʻole ke kauoha ʻia e nā mea kūʻai aku.
He ʻilihune a paʻa ʻole ka paʻa ʻana ma waena o ka torque a me ka ikaika pre tightening o nā galvanized fasteners, a ʻaʻole hoʻohana ʻia lākou no ka hoʻopili ʻana i nā ʻāpana koʻikoʻi. I mea e hoʻomaikaʻi ai i ke kūlike o ka torque preload, hiki ke hoʻohana ʻia ke ʻano o ka uhi ʻana i nā mea lubricating ma hope o ka plating e hoʻomaikaʻi a hoʻonui i ka kūlike o ka torque preload.
2. Phosphating
ʻO kahi kumu kumu, ʻoi aku ka liʻiliʻi o ka phosphating ma mua o ka galvanizing, akā ʻoi aku ka maikaʻi o kona kūpaʻa corrosion ma mua o ka galvanizing. Ma hope o ka phosphating, pono e hoʻopili ʻia ka aila, a pili pono kona kūpaʻa corrosion i ka hana o ka ʻaila i hoʻohana ʻia. No ka laʻana, ma hope o ka phosphating, e noi ana i ka aila anti rust maʻamau a me ka hoʻāʻo ʻana i ka hoʻāʻo ʻana i ka paʻakai paʻakai no 10-20 mau hola wale nō. Hiki ke lawe i ka aila anti rust kiʻekiʻe i 72-96 mau hola. Akā ʻo kona kumukūʻai he 2-3 mau manawa o ka aila phosphating maʻamau.
ʻElua ʻano phosphating maʻamau i hoʻohana ʻia no nā mea paʻa, zinc based phosphating a me manganese based phosphating. ʻOi aku ka maikaʻi o ka lubrication o ka zinc based phosphating ma mua o ka manganese based phosphating, a me ka manganese based phosphating i ʻoi aku ka maikaʻi o ka corrosion a me ke kūpaʻa ʻana ma mua o ka zinc plating. Hiki ke hoʻohana ʻia ma nā mahana mai 225 a 400 degere Fahrenheit (107-204 ℃). ʻOi loa no ka hoʻopili ʻana i kekahi mau mea nui. E like me ka hoʻohui ʻana i nā bolts koʻokoʻo a me nā nati o ka ʻenekini, ke poʻo cylinder, ka halihali nui, nā bolts flywheel, nā bolts huila a me nā nati, etc.
Hoʻohana ka bolts ikaika kiʻekiʻe i ka phosphating, hiki ke pale i nā pilikia embrittlement hydrogen. No laila, hoʻohana maʻamau nā bolts ma luna o ka papa 10.9 i ka ʻoihana ʻoihana i ka mālama ʻana i ka phosphating surface.
3. Oxidation (ʻeleʻele)
ʻO ka ʻeleʻele+ʻaila kahi uhi kaulana no nā mea hoʻopaʻa ʻoihana no ka mea ʻoi aku ka liʻiliʻi a maikaʻi hoʻi ma mua o ka hoʻohana ʻana i ka wahie. Ma muli o kona ʻeleʻele, ʻaneʻane ʻaʻohe hiki ke pale aku i ka ʻōpala, no laila e ʻōpala koke me ka ʻole o ka aila. ʻOiai ma ke alo o ka aila, hiki i ka hoʻāʻo ʻana i ka paʻakai paʻakai ke mau no 3-5 mau hola.
4. Electroplating paku
ʻOi aku ka maikaʻi o ka pale ʻana i ka corrosion o ka cadmium plating, ʻoi aku ka maikaʻi ma nā kaiapuni o ka lewa moana, i hoʻohālikelike ʻia me nā lāʻau lapaʻau ʻē aʻe. He kiʻekiʻe ke kumukūʻai o ka hoʻomaʻemaʻe wai i ka hana o ka electroplating cadmium, a ʻo kona kumukūʻai ma kahi o 15-20 mau manawa o ka electroplating zinc. No laila ʻaʻole hoʻohana ʻia i nā ʻoihana maʻamau, no nā wahi kikoʻī wale nō. Hoʻohana ʻia nā mea hoʻopaʻa no nā paepae ʻeli aila a me nā mokulele HNA.
5. Hoʻopili Chromium
Paʻa loa ka chromium coating i ka lewa, ʻaʻole maʻalahi ke hoʻololi i ke kala a nalowale ka luster, a he kiʻekiʻe ka paʻakikī a me ke kūpaʻa maikaʻi. Hoʻohana maʻamau ka hoʻohana ʻana i ka chromium plating ma nā mea hoʻopili no nā kumu hoʻonaninani. ʻAʻole hoʻohana ʻia i nā ʻoihana ʻoihana me nā koi kūpaʻa corrosion kiʻekiʻe, no ka mea, ʻoi aku ke kumukūʻai o nā mea paʻa chrome plated maikaʻi e like me ke kila kila. Inā lawa ʻole ka ikaika o ke kila kila, hoʻohana ʻia nā mea hoʻopaʻa chrome.
No ka pale ʻana i ka ʻino, pono e uhi mua ʻia ke keleawe a me ka nickel ma mua o ka hoʻopili ʻana i ka chrome. Hiki i ka chromium coating ke kū i nā wela kiʻekiʻe o 1200 degere Fahrenheit (650 ℃). Akā aia kekahi pilikia o ka embrittlement hydrogen, e like me ka electrogalvanizing.
6. Hoʻopili nikela
Hoʻohana nui ʻia i nā wahi e pono ai ka anti-corrosion a me ka conductivity maikaʻi. No ka laʻana, nā pahu puka i waho o nā pihi kaʻa.
7. ʻO ka galvanizing wela
ʻO ka hoʻoheheʻe wela wela he uhi hoʻoheheʻe wela o ka zinc i hoʻomehana ʻia i kahi wai. Aia ka mānoanoa o ka uhi ma waena o 15 a me 100 μm. A ʻaʻole maʻalahi ka mālama ʻana, akā maikaʻi ke kūpaʻa corrosion a hoʻohana pinepine ʻia i ka ʻenekinia. I ka wā o ke kaʻina hana galvanizing wela, loaʻa ka pollution koʻikoʻi, me ka ʻōpala zinc a me ka vapor zinc.
Ma muli o ka uhi mānoanoa, ua pilikia ia i ka wili ʻana i nā kaula i loko a me waho i nā mea paʻa. Ma muli o ka mahana o ka hoʻoili wela wela, ʻaʻole hiki ke hoʻohana ʻia no nā mea paʻa ma luna o ka papa 10.9 (340 ~ 500 ℃).
8. Hoʻokomo Zinc
ʻO ka Zinc infiltration kahi uhi hoʻoheheʻe wela metala paʻa o ka pauka zinc. He maikaʻi kona ʻano like ʻole, a hiki ke loaʻa kahi ʻāpana like ʻole i nā kaula a me nā puka makapō. ʻO 10-110 μm ka mānoanoa pā. A hiki ke hoʻomalu i ka hewa ma 10%. ʻO kona ikaika hoʻopaʻa a me ka hana anti-corrosion me ka substrate ka mea maikaʻi loa i nā uhi zinc (e like me ka electrogalvanizing, hot-dip galvanizing, a me Dacromet). ʻO kāna kaʻina hana he pollution-free a ʻoi aku ka maikaʻi o ke kaiapuni.
9. Dacromet
ʻAʻohe pilikia hydrogen embrittlement, a maikaʻi loa ka hana o ka torque preload consistency. Me ka noʻonoʻo ʻole i ka chromium a me nā pilikia kaiapuni, ʻo Dacromet ka mea kūpono loa no nā mea paʻa ikaika me nā koi anti-corrosion kiʻekiʻe.
Ka manawa hoʻouna: Mei-19-2023
