Ka uhi hoohuli o ka hao hao

ʻO ka hao phosphates a i ʻole nā ​​huahana hoʻomaʻemaʻe hoʻomaʻemaʻe e hana i nā pale hoʻololi liʻiliʻi a ʻike ʻole ʻia ma nā ʻili zinc. Nui nā laina hoʻopau multimetal e hoʻohana i nā phosphate hao i hoʻololi ʻia e hāʻawi ana i ka hoʻomaʻemaʻe, a waiho i ka micro-chemical etch ma nā substrate zinc e hāʻawi i nā waiwai adhesion.

Nui nā kaona a me nā mokuʻāina i kēia manawa i nā palena o ka zinc PPMs, e koi ana i nā mea hoʻopau metala e hāʻawi i ka mālama ʻana i nā hopena i hana ʻia nā substrates zinc.

ʻO ka hoʻololi hoʻololi o ka zinc phosphate, ʻo ia paha, ʻo ia ke kiʻekiʻe kiʻekiʻe o ka uhi ʻana i hiki ke hana ʻia ma luna o kahi galvanized. No ka hana ʻana i kahi uhi zinc phosphate ma ke galvanized, koi ʻia nā mea hoʻolale wikiwiki kūikawā e hoʻōla pono i ka ʻili e loaʻa ai ka uhi zinc phosphate. Hana ʻia kēia mau uhi e ka hana o nā kemika ʻauʻau ma luna o nā mea ʻili. ʻO kahi crystalline zinc phosphate he "ulu" maoli ma ka ʻili o ka substrate maʻemaʻe. I loko o kahi ʻāpana zinc phosphating ʻehiku maʻamau, ʻo nā pae like ʻole:

1. Mea hoʻomaʻemaʻe alkali.
2. Mea hoʻomaʻemaʻe alkali.
3. Holoi wai wela.
4. ʻO ka mea hoʻoheheʻe Zinc phosphate.
5. Holoi wai anuanu.
6. Ma hope o ka mālama ʻana (ʻano chromium a i ʻole ʻano nonchromium).
7. Holoi wai deionized.

E hoʻopau ka ʻāpana ʻeono i ka pae 1, a e hoʻopau ka ʻāpana ʻelima i ka pae 1 a me 7. Ma ke ʻano hoʻoheheʻe mana o ka hoʻohana ʻana, ua hoʻokuʻu ʻia nā ʻāpana e uhi ʻia i loko o kahi tunnel i ka wā e puhi ʻia ai ka hopena mai kahi pahu paʻa. a pulupulu ma lalo o ke kaomi ma luna o nā ʻāpana. Ke hoʻomau nei ka hoʻopili ʻana i ka hopena o ka uhi. ʻenehana hoʻololi hoʻololi. Hoʻohana pinepine ʻia nā uhi phosphate ma ka hoʻohana ʻana i ʻelima, ʻeono, a i ʻole ʻehiku mau pae. Hoʻopaʻa ʻia ka phosphatesolution i loko o kahi mahana wela o 100 a 160 ° F (38 a 71 ° C) no ka pulu; 120 a 200°F (49 a 93°C) no ka hoʻolulu ʻia; aiʻole ka wela lumi no ka holoi lima. ʻO ke kaumaha o ka uhi ʻana o ka zinc phosphate he 150 a 300 mg./sq. ft. ʻO ka manawa hana o 30 a 60 kekona ma ka pulupulu a me ka 1 i ka 5 mau minuke ma ka hoʻomaʻamaʻa ʻana he mea maʻamau. ʻO nā hopena Phosphating he 4 a 6% ka nui ma ka leo a hoʻohana ʻia ma ka pulupulu kaomi o 5 a 10 psi. ʻO ka zinc phosphate ʻO ka uhi ʻana ʻo ia paha kekahi o nā uhi kumu pena maikaʻi loa ma ke kila galvanized. ʻAʻole i hoʻokumu ʻia kahi hoʻonā hoʻoponopono chromium phosphate i kahi uhi kumu pena kūpono ma ke kila galvanized.