ʻO nā pono a me nā pōʻino o ka Trivalent Chromium Plating

ʻO ka mea mua, he aha ka Trivalent?

He ahoʻopalapala chrome hoʻonani, hiki ke hāʻawi i ka pale ʻana a me ka corrosion i nā koho kala like ʻole.ʻO ka chrome trivalentua manaʻo ʻia ʻo ia ka ʻokoʻa eco-friendly i ka hexavalent chromium.

A laila, e nānā pono kākou i kēia kaʻina hana e hoʻomaopopo i kona mau pono a me nā hemahema.

Pono:

ʻO nā pono o kanā hana chromium trivalentma luna o ke kaʻina hana hexavalent chromium he liʻiliʻi ka hopohopo kaiapuni ma muli o ka haʻahaʻa haʻahaʻa o ka trivalent chromium, ʻoi aku ka nui o ka huahana, a me nā kumukūʻai hana haʻahaʻa.

I ka hana trivalent chromium, hexavalent chromium he mea haumia ʻauʻau.No laila, ʻaʻole i loaʻa i ka ʻauʻau ka nui o ka hexavalent chromium.ʻO ka huina chromium o nā ʻano hoʻonā trivalent chromium ma kahi o hoʻokahi hapalima o nā haʻina chromium hexavalent.

Ma muli o ke kemika o ka trivalent chromium electrolyte, ʻaʻole hiki mai ka noe i ka wā o ka hoʻopalapala ʻana e like me ka hana ʻana i ka wā hexavalent chromium plating.ʻO ka hoʻohana ʻana i ka trivalent chromium e hōʻemi ana i nā pilikia a me nā kumukūʻai.

Nā hemahema:

ʻO nā hemahema o ke kaʻina hana trivalent chromium ʻoi aku ka maʻalahi o ke kaʻina hana i ka contamination ma mua o ke kaʻina hana hexavalent chromium, a ʻaʻole hiki i ke kaʻina trivalent chromium ke hoʻopaʻa i ka piha piha o ka mānoanoa pā e hiki ai i ke kaʻina hexavalent chromium.Ma muli o ka paʻakikī i ka hoʻohaumia ʻana, pono ke kaʻina hana trivalent chromium e ʻoi aku ka hoʻomaʻemaʻe ʻana a me ka ʻoi aku ka paʻa o ka hoʻokele laboratory ma mua o ke kaʻina hana hexavalent chromium.Hiki i nā ʻauʻau ʻauʻau Trivalent chromium ke pā mānoanoa a hiki i ka 0.13 a 25 µm.ʻAʻole hiki ke hoʻohana ʻia no ka hapa nui o nā noi chromium paʻakikī.

Ua hoʻomohala mua ʻia nā ʻauʻau ʻauʻau ʻauʻau trivalent chromium e pani i nā ʻauʻau ʻauʻau hexavalent chromium plating.Ua paʻakikī ka hoʻomohala ʻana i kahi ʻauʻau trivalent no ka mea e hoʻoheheʻe ʻia ka chromium trivalent i ka wai e hana i nā ion paʻa paʻakikī ʻaʻole e hoʻokuʻu koke i ka chromium.I kēia manawa, ʻelua ʻano kaʻina hana trivalent chromium ma ka mākeke: hoʻokahi-cell a me pālua-cell.ʻO nā ʻokoʻa nui o nā kaʻina hana ʻelua, ʻo ka hoʻonā kaʻina hana pālua ʻelua i loaʻa nā chlorides liʻiliʻi-a-ʻole, ʻoiai ʻo ka hoʻonā kaʻina hana hoʻokahi he kiʻekiʻe o nā chlorides.

Eia kekahi, hoʻohana ke kaʻina hana pālua i nā anodes alakaʻi i hoʻokomo ʻia i loko o nā pahu anode i loaʻa i kahi solution sulfuric acid dilute a ua hoʻopaʻa ʻia me kahi membrane permeable, ʻoiai ke kaʻina hana hoʻokahi e hoʻohana i nā anodes kalapona a i ʻole graphite i hoʻopili pololei ʻia me. ka hoʻonā paʻi.ʻAʻole i loaʻa nā kikoʻī e pili ana i kēia mau kaʻina hana no ka mea ʻo nā ʻauʻau trivalent chromium i kēia manawa ma ka mākeke.

Eia nā pono nui no Trivalent chrome:

· Pilikino i ke kaiapuni - ʻoi aku ka liʻiliʻi o nā uahi ʻawaʻawa ma mua o ka hoʻopaʻa ʻana hexavalent

· Liʻiliʻi ka ʻōpala ʻōpala

· E hoʻohaʻahaʻa i nā kumukūʻai mālama wai ʻino

· Liʻiliʻi nā hoʻoponopono hoʻokolohua a me nā koina pili

ʻO nā hemahema penei:

· He kumu kūʻai kiʻekiʻe iki ma nā kemika a me ka mālama ʻana ma mua o ka hoʻoheheʻe hexavalent.

· Paʻakikī i ke koho anode

· Hoʻohui hoʻonā paʻakikī

· Paʻakikī i ka hoʻonui ʻana i ka mānoanoa o ka uhi ʻana