He aha nā mea hoʻoheheʻe wela wela?
Nui nā ʻano o ka uhi wela no nā pā kila a me nā ʻōpala. ʻO nā lula hoʻokaʻawale ma waena o nā maʻamau nui-me nā kūlana aupuni ʻAmelika, Iapana, ʻEulopa, a me Kina. E loiloi mākou me ka hoʻohana ʻana i ka maʻamau ʻEulopa EN 10346:2015 ma ke ʻano he laʻana.
Hāʻule nā uhi wela wela nui i ʻeono mau ʻāpana nui:
- ʻO ka zinc maʻemaʻe wela (Z)
- Pākuʻi zinc-hao wela (ZF)
- ʻO ka zinc-aluminum wela (ZA)
- Aluminum-zinc wela wela (AZ)
- Aluminum-silikona wela wela (AS)
- ʻO ka zinc-magnesium (ZM)
ʻO nā wehewehe a me nā hiʻohiʻona o nā uhi wela wela
Hoʻokomo ʻia nā ʻāpana kila i hana mua ʻia i loko o ka ʻauʻau hoʻoheheʻe. ʻO nā metala hoʻoheheʻe ʻē aʻe i loko o ka ʻauʻau e hāʻawi mai i nā uhi ʻokoʻa (koe naʻe nā mea hoʻoheheʻe zinc-hao).
Hoʻohālikelike ma waena o Hot-Dip Galvanizing a me Electrogalvanizing
1. Hōʻikeʻike Kaʻina Galvanizing
ʻO ka Galvanizing e pili ana i ka ʻenehana lapaʻau ʻili o ka hoʻopili ʻana i ka uhi zinc i nā metala, nā mea hao, a i ʻole nā mea ʻē aʻe no ka hana nani a me ka anti-corrosion. ʻO nā ʻano hana i hoʻohana nui ʻia ʻo ia ka wela-dip galvanizing a me ke anuanu galvanizing (electrogalvanizing).
2. Ke Kaʻina Hana Galvanizing Hot-Dip
ʻO ke ala mua no ka hoʻoulu ʻana i nā ʻili o ka ʻili kila i kēia lā, ʻo ia ka hot-dip galvanizing. ʻO ka galvanizing Hot-dip (ʻike ʻia ʻo ka hot-dip zinc coating a i ʻole hot-dip galvanization) he ala kūpono no ka pale ʻana i ka ʻino metala, i hoʻohana mua ʻia ma nā hale hana metala ma waena o nā ʻoihana like ʻole. Hoʻokomo ia i ka hoʻokomo ʻana i nā ʻāpana kila i hoʻohemo ʻia i ka zinc i hoʻoheheʻe ʻia ma kahi o 500 ° C, e waiho ana i kahi papa zinc ma ka ʻili kila e hiki ai ke kū i ka corrosion. Ke kahe kaʻina hana hoʻoheheʻe wela: Holoi waiʻakika huahana → Holoi wai → Ka hoʻohana ʻana i ka flux → Hoʻomaloʻo → Kau ʻia no ka uhi ʻana → Hoʻomaʻamaʻa → Hoʻomaʻemaʻe ʻia → Hoʻomaʻemaʻe → Hoʻomaʻamaʻa → Hoʻopau ʻia ka galvanizing wela.
3. Ke Kaʻina Hana Galvanizing Cold-Dip
ʻO ka galvanizing anuanu, i ʻike ʻia ʻo electrogalvanizing, hoʻohana i nā lako electrolytic. Ma hope o ka holoi ʻana a me ka holoi ʻana i ka waikawa, hoʻokomo ʻia nā paipu paipu i loko o kahi hopena i loaʻa nā paʻakai zinc a hoʻopili ʻia i ka hopena maikaʻi ʻole o nā mea hana electrolytic. Hoʻonoho ʻia kahi pā zinc ma ke alo o nā mea hoʻopili a hoʻopili ʻia i ka pahu kūpono. Ke hoʻohana ʻia ka mana, ʻo ka neʻe ʻana o ke au mai ka maikaʻi a i ʻole ke kumu e waiho ai ka zinc ma luna o nā mea pono. Hoʻopili ʻia nā paipu anuanu-galvanized ma mua o ka galvanization.
Hoʻokō nā kūlana ʻenehana me ASTM B695-2000 (US) a me ka kikoʻī pūʻali koa C-81562 no ka galvanization mechanical.
Hoʻohālikelike ʻia ʻo Hot-Dip Galvanizing vs. Cold-Dip Galvanizing
ʻOi aku ka maikaʻi o ka pale ʻana i ka corrosion ma mua o ka galvanizing wela (ʻike ʻia ʻo electrogalvanizing). ʻO nā uhi uila electrogalvanized maʻamau mai 5 a 15 μm ka mānoanoa, aʻo nā uhi galvanized wela ma mua o 35 μm a hiki i ka 200 μm. Hāʻawi ʻo Hot-dip galvanizing i ka uhi ʻoi aku ka maikaʻi me kahi uhi paʻa me ka ʻole o nā hoʻokomo organik. Hoʻohana ʻo Electrogalvanizing i nā uhi piha i ka zinc e pale i nā metala mai ka ʻino. Hoʻopili ʻia kēia mau uhi i ka ʻili i pale ʻia me ka hoʻohana ʻana i ke ʻano o ka uhi ʻana, e hana ana i kahi papa zinc-piha ma hope o ka maloʻo ʻana. Aia i loko o ka uhi maloʻo ka nui o ka zinc (a hiki i 95%). Hoʻopili ke kila i ka zinc plating ma kona ʻili ma lalo o nā kūlana maloʻo, akā ʻo ka hoʻoheheʻe wela e pili ana i ka uhi ʻana i nā paipu kila me ka zinc ma o ka hoʻoinu wela. Hāʻawi kēia kaʻina hana i ka adhesion ikaika loa, e hana ana i ka pale ʻana i ka pale ʻana i ka peeling.
Pehea e hoʻokaʻawale ai i ka galvanizing wela mai ka galvanizing anuanu?
1. ʻIke ʻike
ʻOi aku ka ʻeleʻele o nā ili wela wela, e hōʻike ana i nā kaha wai, nā kulu, a me nā nodule i hana ʻia e ka kaʻina hana. ʻO ka hiʻohiʻona holoʻokoʻa he keʻokeʻo keʻokeʻo.
ʻOi aku ka maʻemaʻe o nā ʻili uila, ʻoi aku ka melemele-ʻōmaʻomaʻo, ʻoiai ke ʻike ʻia ka ʻāʻī, ʻulaʻula-keʻokeʻo, a keʻokeʻo paha me ka ʻōmaʻomaʻo. ʻAʻole hōʻike ʻia kēia mau ʻili i nā nodule zinc a i ʻole ka puʻupuʻu.
2. Hoʻokaʻawale ma ke kaʻina hana
Hoʻokomo ʻia ka galvanizing wela i nā ʻanuʻu he nui: degreasing, pickling acid, immersion kemikala, maloʻo, a me ka hoʻopaʻa hope ʻana i loko o ka zinc hehee no kahi lōʻihi ma mua o ka wehe ʻana. Hoʻohana ʻia kēia kaʻina hana no nā mea e like me nā paipu galvanized hot-dip.
Cold galvanizing, naʻe, he mea pono electrogalvanizing. Hoʻohana ia i nā lako electrolytic kahi e hoʻoheheʻe ʻia ai ka mea hana ma mua o ka hoʻokomo ʻia ʻana i loko o ka wai paʻakai zinc. Hoʻohui ʻia i ka mea hana electrolytic, waiho ka mea hana i kahi papa zinc ma o ka neʻe ʻana o kēia manawa ma waena o nā electrodes maikaʻi a maikaʻi ʻole.
Ka manawa hoʻouna: Oct-01-2025
