ʻO Dacromet Flange Bolts: ʻOi aku ka maikaʻi o ka anti-corrosion a me ka anti-rust performance no nā noi koi. 

ʻO ka Dacromet kahi ʻōnaehana hoʻoheheʻe inorganic non-electrolytic i hoʻokumu ʻia i ka wai i haku mua ʻia me ka zinc a me nā ʻāpana alumini i hoʻopuehu ʻia i loko o kahi mea hoʻopaʻa chromium-ʻole a i ʻole chromium-free. Hoʻohana ʻia e ka dip-spin, spray, a dip-drain paha a ma hope o ka hoʻōla ʻia ʻana o ka wela, ua hana ka uhi i kahi lahilahi (maʻamau 5-15 μm), ʻaʻahu, ʻoniʻoni pale hina-hinahina e pili pono ana i ka substrate kila.

Hoʻohana ka mīkini anti-corrosion o Dacromet ma o nā hana hoʻohui ʻehā:

1. Pale pale: Hoʻokumu ka zinc a me ka alumini flakes i nā ʻāpana he nui e pale i ke komo ʻana o ka wai, oxygen, a me nā ion corrosive.

2.Sacrificial (galvanic) pale: Hana ʻo Zinc ma ke ʻano he anode mōhai, ʻoi aku ka maikaʻi o ka corroding e pale i ke kila o lalo mai ka ʻōpala.

3. Ho'ōla iā ia iho / hoʻoponopono iā ia iho: ʻO nā huahana oxidation o ka zinc a me ka alumini e hoʻopiha i ka micro-damage i ka uhi, e mālama mau ana i ka kūpaʻa anti-rust.

4.Passivation: ʻO ka mea hoʻopaʻa paʻa ʻole a me nā pūhui passivating e hoʻolōʻihi i ka hoʻohana ʻana i ka zinc, e hoʻolōʻihi i ka pale ʻana i ka corrosion.

Ma muli o ke kaʻina hana ʻaʻole pili i ka pickling acid a i ʻole electrolysis, hoʻopau loa ka uhi ʻana o Dacromet i ka pilikia o ka hoʻoheheʻe ʻana o ka hydrogen—he pono koʻikoʻi no nā bolts ikaika kiʻekiʻe (Papa 10.9, 12.9, a me ASTM A490 / F3125). ʻO kēia ka hana ʻana i nā bolts flange Dacromet i hilinaʻi ʻia a kūpaʻa loa i ka ʻōpala a me ka pōʻino o ke kaiapuni.

3. Nā Pōmaikaʻi Nui o Dacromet Flange Bolts

3.1 Kūʻē Kūʻē Kūʻē a me ke Kūʻē ʻana i ka Rust

Hoʻokō mau ʻia nā bolts flange i uhi ʻia ʻo Dacromet 1,000 hola a ʻoi aku paha ʻO ka hoʻāʻo ʻana o ka paʻakai paʻakai kūʻokoʻa (ASTM B117 / ISO 9227) me ka ʻole o ke ʻano o ka ʻulaʻula. Ma nā kikoʻī he nui, ua hoʻopaneʻe ʻia ka ʻōpala keʻokeʻo ma mua o 240-500 mau hola, a ʻo ka hana anti-corrosion holoʻokoʻa he 7-10 mau manawa ma mua o ka electrogalvanizing maʻamau. ʻO kēia mana koʻikoʻi hiki ke pale i ka ʻōpala e hōʻoia i ka lōʻihi o ka lawelawe ʻana ma ke kahakai, kai, ʻoihana, a me ka de-icing-paakai.

3.2 ʻAʻohe pilikia o ka hoʻoheheʻe ʻana o ka hydrogen

ʻAʻole e like me nā kaʻina hana electroplating e hoʻokomo i ka hydrogen i loko o ke kila kiʻekiʻe, ʻo ka Dacromet dip-spin a i ʻole ke kaʻina hoʻoheheʻe ʻana ʻaʻole ia he electrolytic. No laila, paʻa nā bolts flange ikaika kiʻekiʻe i ko lākou mau pono mīkini piha a ʻaʻole i hoʻopaneʻe ʻia mai ka haki ʻana i ka haki ʻana i hoʻokumu ʻia e ka hydrogen embrittlement—e hāʻawi ana i ka pale anti-rust a me ka palekana o ke kūkulu ʻana.

3.3 U'i, Uhi Kaulike me ka Mana Mana Mana

ʻO ka mānoanoa o ka uhi maʻamau mai 5 a 15 μm. ʻAʻole hiki i kēia kiʻi ʻoniʻoni ke hoʻololi nui i nā ana o ka milo, e ʻae ana i ka hoʻohana ʻana i nā nati maʻamau me ka ʻole o ka overtapping. Hoʻokomo ʻia ka uhi ʻana i nā geometries paʻakikī, nā kaula, a me nā recesses like ʻole, e hōʻoiaʻiʻo ana i ka uhi anti-corrosion piha ʻoiai ma nā profiles flange bolt paʻakikī.

3.4 Paʻa Kūlana Kiʻekiʻe a me nā Pono Hou

Hoʻohana maikaʻi ʻia nā uhi Dacromet ma nā wela mau a hiki i ka 250-300 °C, ʻoi aku ma mua o nā palena wela o ka hoʻopaʻa zinc maʻamau. ʻO nā mea maikaʻi ʻē aʻe e pili ana i ka hiki ke pena maikaʻi, nā coefficients friction controled (ʻoi loa me nā kapa lubricated), ka hoʻohālikelike bimetallic me ka alumini, a me ka hoʻokō ʻana i nā kūlana kaʻa a me nā kaiapuni.