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ʻO ke kumu hana o ka uhi wela wela
ʻO ka galvanizing wela kahi hana o ka hoʻoheheʻe kemika metallurgical. Mai kahi hiʻohiʻona microscopic, ʻo ke kaʻina o ka hoʻoheheʻe wela wela e pili ana i ʻelua equilibria ikaika: equilibrium thermal a me zinc iron exchange equilibrium. Ke hoʻokomo ʻia nā ʻāpana kila i loko o ka zinc hoʻoheheʻe ʻia ma kahi o 450 ℃, ʻo nā ʻāpana kila i ka lumi wela e hoʻomoʻa i ka wela o ka wai zinc. Ke ʻoi aku ka mahana ma mua o 200 ℃, ʻike ʻia ka pilina ma waena o ka zinc a me ka hao, a komo ka zinc i ka papa honua o nā ʻāpana hao.

Ke hoʻokokoke mālie nei ka mahana o ke kila i ka mahana o ka wai zinc, ua hoʻokumu ʻia nā ʻāpana hui me nā lākiō hao zinc like ʻole ma ka ʻili o ke kila, e hana ana i kahi ʻano papa o ka uhi zinc. Ke hele nei ka manawa, hōʻike ʻia nā ʻāpana ʻokoʻa like ʻole o ka uhi ʻana i ka ulu ulu ʻana. Mai kahi hiʻohiʻona macro, ʻike ʻia ke kaʻina hana i luna e like me ka hoʻoheheʻe ʻia ʻana o nā ʻāpana kila i loko o ka wai zinc, e hoʻolapalapa ai ka ʻili wai zinc. Ke hoʻohālikelike ʻia ka hopena kemika hao zinc, mālie mālie ka ʻili wai zinc.
Ke hoʻokiʻekiʻe ʻia ka ʻāpana kila i ka pae wai zinc, a emi mālie ka mahana o ka ʻāpana kila ma lalo o 200 ℃, pau ka hopena kemika hao zinc, a hoʻokumu ʻia kahi uhi galvanized wela, me ka mānoanoa.
Nā koi mānoanoa no nā pale galvanized wela
ʻO nā kumu nui e pili ana i ka mānoanoa o ka zinc coating e like me: substrate metal composition, surface roughness of steel, content and distribution of active elements silicon and phosphorus in steel, stress internal of steel, geometric dimensions of steel parts, and hot-dip galvanizing process.
Hoʻokaʻawale ʻia nā kūlana galvanizing wela honua a me Kina i nā ʻāpana e pili ana i ka mānoanoa o ke kila. Pono ka mānoanoa honua a me ka ʻāina o ka uhi zinc i ka mānoanoa kūpono e hoʻoholo ai i ke kūpaʻa ʻino o ka uhi zinc. ʻO ka manawa i koi ʻia no ka loaʻa ʻana o ke kaulike wela a me ke kaulike hoʻololi hao zinc paʻa ʻokoʻa no nā ʻāpana kila me nā mānoanoa like ʻole, ka hopena i nā mānoanoa uhi ʻokoʻa. Hoʻokumu ʻia ka mānoanoa o ka uhi ʻana i ka maʻamau i ka waiwai ʻike hana ʻenehana o ka loina wela-dip galvanizing i ʻōlelo ʻia ma luna, a ʻo ka mānoanoa kūloko ka waiwai ʻike e pono ai e noʻonoʻo i ka mahele like ʻole o ka mānoanoa o ka zinc coating a me nā koi no ka pale ʻana i ka corrosion. .

No laila, ʻokoʻa iki nā koi o ka ISO, American ASTM standards, Japanese JIS standards, a me nā kūlana Kina no ka mānoanoa o ka zinc coating, a ʻaʻole nui ka ʻokoʻa.
ʻO ka hopena a me ka mana o ka mānoanoa o ka uhi galvanized wela
ʻO ka mānoanoa o ka uhi wela wela e hoʻoholo ai i ka pale ʻana o nā ʻāpana plated. No ke kūkākūkā kikoʻī, e ʻoluʻolu e nānā i ka ʻikepili pili i hāʻawi ʻia e ka American Hot Dip Galvanization Association ma ka hoʻopili. Hiki i nā mea kūʻai ke koho i ka mānoanoa o ka zinc coating i ʻoi aku ka kiʻekiʻe a i ʻole ka haʻahaʻa ma mua o ka maʻamau.
He mea paʻakikī ka loaʻa ʻana o kahi uhi mānoanoa i ka hana ʻoihana no nā papa kila lahilahi me kahi ʻili laulima o 3mm a i ʻole. Eia kekahi,ʻo ka mānoanoa o ka zinc coating i kūponoʻole i ka mānoanoa kila e hiki ke hoʻopili i ka hoʻopiliʻana ma waena o ka uhi a me ka substrate, a me keʻano o ka hiʻohiʻona o ka uhi. Hiki i ka uhi mānoanoa nui ke kumu o ka uhi ʻana i mea ʻoʻoleʻa, maʻalahi i ka ʻili ʻana, a ʻaʻole hiki i nā ʻāpana i hoʻopaʻa ʻia ke kū i ka hui ʻana i ka wā o ka lawe ʻana a me ke kau ʻana.
Inā nui nā mea hana e like me ke silikoni a me ka phosphorus i ke kila, he paʻakikī hoʻi ka loaʻa ʻana o nā uhi thinner i ka hana ʻoihana. ʻO kēia no ka mea e pili ana ka ʻike silika i loko o ke kila i ke ʻano ulu o ka ʻāpana hao zinc, kahi e ulu wikiwiki ai ka zeta phase zinc iron alloy layer a paʻi i ka pae zeta i ka ʻili o ka uhi, e hopena i kahi ʻala ʻO ka ʻili o ka ʻili, e hoʻohua ana i kahi uhi ʻeleʻele hina me ka hoʻopili maikaʻi ʻole.
No laila, e like me ka mea i ʻōlelo ʻia ma luna nei, aia ka maopopo ʻole o ka ulu ʻana o nā pale galvanized wela. ʻO ka ʻoiaʻiʻo, paʻakikī pinepine ka loaʻa ʻana o kahi ʻano o ka mānoanoa o ka uhi ʻana i ka hana, e like me ka mea i ʻōlelo ʻia ma nā kūlana wela wela.
ʻO ka mānoanoa kahi waiwai empirical i hana ʻia ma hope o ka nui o nā hoʻokolohua, me ka noʻonoʻo ʻana i nā kumu like ʻole a me nā koi, a he ʻepekema a kūpono hoʻi.