Nūhou

ʻO ka Hot Dip Galvanizing, ka mea i ʻike ʻia ʻo ka hot dip galvanizing a me ka hot dip galvanizing, kahi ala kūpono o ka pale ʻana i ka corrosion metala, hoʻohana nui ʻia no nā hale metala a me nā mea hana i nā ʻoihana like ʻole.ʻO ia ka hoʻokomo ʻana i nā ʻāpana kila i hoʻoheheʻe ʻia i loko o ka zinc hehee ma kahi o 500 ℃ e hoʻopili i kahi papa zinc i ka ʻili o nā mea kila, a laila e hoʻokō ai i ke kumu o ka pale ʻana i ka corrosion.Kahe ʻana o ke kaʻina hana hoʻoheheʻe wela: hoʻopau ʻia ka huahana - holoi wai - hoʻohui ʻia i ka wai hoʻoheheʻe kōkua - hoʻomaloʻo - kau ʻia - hoʻomaloʻo - lāʻau lapaʻau - hoʻomaʻemaʻe - polishing - hoʻopau ʻana i ka galvanizing wela wela. , a he mōʻaukala ʻoi aku ma mua o 170 mau makahiki mai ka hoʻohana ʻana o Farani i ka galvanizing hot dip i ka ʻoihana ma 1836. I nā makahiki he kanakolu i hala iho nei, me ka hoʻomohala wikiwiki ʻana o ke kila ʻōwili ʻia, ua hoʻomohala ʻia ka ʻoihana galvanizing wela ma ke ʻano nui.
ʻO ka galvanizing wela wela, ʻike ʻia hoʻi ʻo ka wela wela, he ala ia no ka loaʻa ʻana o ka uhi metala ma nā ʻāpana kila ma ka hoʻokomo ʻana iā lākou i loko o ka zinc hehee.Me ka hoʻomohala wikiwiki o ka lawe ʻana i ka mana kiʻekiʻe, ka lawe ʻana, a me nā kamaʻilio, ʻoi aku ka kiʻekiʻe o nā koi no ka pale ʻana i nā ʻāpana kila, a ke piʻi nei hoʻi ke koi no ka hot dip galvanizing.

Hana pale
ʻO ka maʻamau, ʻo ka mānoanoa o ka papa galvanized he 5 ~ 15 μm.He 35 μ Ma luna o ka m, a hiki i ka 200 μm ka papa galvanized wela wela. He hiki ke uhi maikaʻi ʻo Hot dip galvanizing, ka uhi paʻa, ʻaʻohe mea hoʻohui.Ua ʻike ʻia ʻo nā ʻano hana o ke kūʻē ʻana o ka zinc i ka corrosion o ka lewa me ka pale mechanical a me ka pale electrochemical.Ma lalo o nā kūlana ʻinoʻino o ka lewa, aia ka ZnO, Zn (OH) 2, a me nā kiʻiʻoniʻoni pale zinc carbonate maʻamau i ka ʻili o ka papa zinc, kahi e hoʻolohi ai i ka ʻino o ka zinc.Inā pōʻino kēia kiʻiʻoniʻoni pale (ʻike ʻia ʻo ka ʻele keʻokeʻo), e hana ia i kahi papa kiʻiʻoniʻoni hou.Ke hoʻopōʻino nui ʻia ka papa zinc a hoʻoweliweli i ka pā hao, hāʻawi ka zinc i ka pale electrochemical i ka substrate.ʻO ka mana maʻamau o ka zinc ʻo -0.76V, a ʻo ka mana maʻamau o ka hao he -0.44V.I ka hana ʻana o ka zinc a me ka hao i ka puʻupuʻu micro, hoʻoheheʻe ʻia ka zinc ma ke ʻano he anode, a pale ʻia ka hao e like me ka cathode.ʻIke loa, ʻoi aku ka maikaʻi o ka pale ʻana i ka corrosion o ka wela wela ma ka hao kumu ma mua o ka electrogalvanizing.
Ke kaʻina hana hoʻoheheʻe zinc
ʻO ke kaʻina hana o ka papa galvanized hot dip he hana ia o ka hana ʻana i ka hao zinc alloy ma waena o ka substrate hao a me ka papa zinc maʻemaʻe ma waho o Z. Hoʻokumu ʻia ka ʻili hao zinc alloy ma ka ʻili o ka mea hana i ka wā o ka hoʻoheheʻe wela, kahi hiki i ka hui maikaʻi ma waena o ka hao a me ka papa zinc maʻemaʻe.Hiki ke wehewehe maʻalahi ke kaʻina hana penei: Ke hoʻokomo ʻia ka mea hana hao i loko o ka wai zinc i hoʻoheheʻe ʻia, hoʻokumu mua ʻia ka zinc a me ka zinc ma ke kikowaena α Iron (kino kino) hoʻoheheʻe paʻa.He aniani kēia i hana ʻia e ka hoʻoheheʻe ʻana i nā ʻātoma zinc ma ke kūlana paʻa o ka hao kumu.Hoʻohui ʻia nā ʻātoma metala ʻelua, a liʻiliʻi ka huki ʻana ma waena o nā ʻātoma.No laila, i ka hiki ʻana o ka zinc i ka saturation i loko o ka hehee paʻa, ʻo nā ʻātoma kumu ʻelua o ka zinc a me ka hao e hoʻopuehu kekahi i kekahi, a hoʻopuehu ʻia nā ʻātoma zinc i loko (a i hoʻokomo ʻia i loko) o ka matrix hao i loko o ka lattice matrix, e hana mālie i kahi huila me ka hao. , ʻoiai ka hao a me ka zinc i hoʻoheheʻe ʻia i loko o ka wai zinc i hoʻoheheʻe ʻia e ke kila ikaika kiʻekiʻe e hana i kahi pūhui intermetallic FeZn13, e komo ana i lalo o ka ipu hao wela, e hana ana i ka zinc slag.Ke hoʻoneʻe ʻia ka mea hana mai ka hoʻoheheʻe zinc dipping solution, hoʻokumu ʻia kahi papa zinc maʻemaʻe ma luna o ka ʻili, ʻo ia ke aniani hexagonal.ʻAʻole ʻoi aku ka nui o ka hao ma mua o 0.003%.
ʻokoʻa ʻenehana
ʻOi aku ka kiʻekiʻe o ke kūpaʻa corrosion o ka galvanizing wela ma mua o ka galvanizing anuanu (ʻike ʻia ʻo galvanization).ʻAʻole e ʻōpala ka galvanizing wela i loko o kekahi mau makahiki, ʻoiai ʻo ka galvanizing anuanu e pulu i loko o ʻekolu mahina.
Hoʻohana ʻia ke kaʻina hana electrogalvanizing e pale i nā metala mai ka ʻino."E loaʻa kahi papa pale metala maikaʻi ma nā ʻaoʻao a me nā ʻili o ka huahana, e hoʻohui i kahi ʻāpana nani i ka pono.I kēia mau lā, ʻoi aku ka nui o nā ʻoihana nui no nā ʻāpana huahana a me ka ʻenehana, no laila pono e hoʻoponopono i ka ʻenehana i kēia manawa. "