ʻO Dacromet Bolts: ʻOi aku ka maikaʻi o ka pale ʻana a me ka pale ʻana i ka Rust no ka ʻenekinia hou 

2. Ka hoomaopopo ana i ka Dacromet Coating Technology

2.1 Ka Hoʻohui a me ke ʻano

ʻO Dacromet kahi ʻōnaehana pale zinc-flake proprietary i hoʻolālā ʻia no ka pale corrosion kiʻekiʻe. Aia ka uhi ʻana i ka zinc microscopic a me nā flakes alumini i hoʻokuʻu ʻia i loko o kahi matrix binder inorganic, maʻamau ma luna o nā chromium oxides a i ʻole nā ​​​​hui like. Ke hoʻohana ʻia i ka bolt a hoʻōla ʻia ma o ke kaʻina hana kuke ʻana, ua hoʻopili kēia mau flakes i nā ʻāpana he nui, e hana ana i kahi pā paʻa, lamellar e pale pono ai i ke komo ʻana o nā media corrosive e like me ka wai, oxygen, a me nā ion chloride.

ʻO ka mānoanoa kiʻiʻoniʻoni maʻamau o kahi uhi Dacromet ma kahi pahu bolt mai kahi o 5 a 15 micrometers. ʻOiai ʻo kēia hiʻohiʻona lahilahi, hāʻawi ka hale multilayered i nā waiwai pale kūʻokoʻa. ʻO ka zinc flakes ke hana kaumaha, ʻoi aku ka maikaʻi o ka corroding no ka pale ʻana i ka substrate kila, ʻoiai nā mea alumini e hoʻonui i ka paʻa a me nā hiʻohiʻona passivation. He mea koʻikoʻi kēia ʻano hana ʻelua i ka pale corrosion koʻikoʻi a me ka hana pale ʻana i ka ʻōpala e hoʻokaʻawale i nā bolts Dacromet mai nā mea paʻa i uhi ʻia.

2.2 Ke Kaʻina Hana Noi

Hoʻomaka ke kaʻina hana uhi Dacromet me ka hoʻomākaukau pono ʻana o ka ʻili o ka bolt e hōʻoia i ka pili pono. Hoʻokomo ʻia ka mea hoʻopaʻa maʻemaʻe i loko a i ʻole ʻia me ka slurry zinc-aluminum ma ka wai. Ma hope o ka hoʻohana ʻana, e hoʻokele ʻia ka bolt i uhi ʻia i kahi pōʻai hoʻomalu mālama ʻia i nā wela kiʻekiʻe. I loko o kēia hoʻomaʻamaʻa wela, hoʻopaʻa ʻia ka mea hoʻopili inorganic a me nā flakes metala i loko o kahi kiʻiʻoniʻoni paʻa mau e hāʻawi ai i ka pale ʻino.

ʻO kekahi o nā pōmaikaʻi koʻikoʻi o ke kaʻina hana Dacromet no nā bolts, ʻo ia ka nele o ka pickling acid aggressive i nā ʻano hana like ʻole. Pono pinepine ka electroplating maʻamau i ka hoʻomaʻemaʻe waikawa ikaika, hiki ke hoʻokomo i ka hydrogen i loko o nā kila ikaika a alakaʻi i ka hydrogen embrittlement. Ma ka hōʻemi ʻana a i ʻole ka hoʻopau ʻana i kēia pilikia, mālama ʻo Dacromet coating i ka pono mechanical o nā bolts high-tensile ʻoiai e hāʻawi mau ana i ka pale corrosion koʻikoʻi a me ka pale ʻana i ka ʻōpala lōʻihi.

3. Hoʻomalu ʻino a me ka hana pale ʻana i ka Rust

3.1 Hana Hana

Hoʻohālikelike ʻia nā mana pale corrosion o Dacromet bolts ma o ka hoʻāʻo ʻana i ka paʻakai paʻakai e like me nā kūlana ASTM B117 a i ʻole ISO 9227. Loaʻa mau nā uhi Dacromet kiʻekiʻe i ka 720 a ʻoi aku ma mua o 1,000 mau hola o ka hoʻolaha ʻana ma mua o ka ʻike ʻia ʻana o ka ʻula ʻula ma ka ʻili o ka bolt. I loko o nā ʻano hoʻohālikelike hou e hoʻopili ai i nā sealers a i ʻole topcoats, hiki ke hana ma mua o 1,500 a i ʻole 2,000 mau hola. ʻOi aku kēia pae o ka pale ʻana i ka ʻōpala ma mua o ka zinc electroplating maʻamau a ʻoi aku ka maikaʻi ma mua o ka galvanizing hot-dip kuʻuna ma lalo o nā kūlana hoʻohālikelike like.

Ma waho aʻe o ka hoʻāʻo ʻana i ka paʻakai paʻakai paʻakai, hōʻike nā bolts Dacromet i ke kūpaʻa maikaʻi loa i nā hoʻāʻo corrosion cyclic e hoʻohālikelike pono i ka ʻike honua maoli. Hoʻopili kēia mau protocols i nā manawa like ʻole o ka noe paʻakai, ka haʻahaʻa, a me ka maloʻo ʻana, e hoʻopiʻi ana i ka hiki o ka uhi ke mālama mau i ka pale pale. ʻO ka papa hana zinc-aluminum o Dacromet e pane maikaʻi i kēlā mau kūlana ikaika, e mālama ana i ka pale corrosion hilinaʻi ʻoiai ma hope o ka lōʻihi o ka hoʻolaha ʻana.

3.2 Mechanisms of Protection

ʻO ka pale corrosion kiʻekiʻe i hāʻawi ʻia e Dacromet bolts ka hopena mai nā ʻano hana synergistic. ʻO ka mea mua, ʻo ka pale kino i hana ʻia e nā ʻāpana metala i hoʻopā ʻia e pale i ka laha ʻana o ka wai, oxygen, a me nā ion chloride i ka substrate kila. ʻO ka lua, ʻo ka hana ʻālana o ka zinc flakes e hāʻawi i ka pale cathodic i kēlā me kēia microscopic discontinuities i loko o ka uhi. ʻO ke kolu, ʻo ka hoʻokumu ʻana i nā huahana corrosion paʻa a me nā kiʻiʻoniʻoni passivation e hoʻonui hou i ka pale ʻana i ka ʻōpala no ka wā lōʻihi ma o ka hoʻopaʻa ʻana i nā ala kūpono no ka hoʻouka hou ʻana. ʻO kēia hoʻolālā pale pale lehulehu e hiki ai i nā bolts i uhi ʻia ʻo Dacromet e mālama i ka kūpaʻa a me ka hiʻohiʻona ʻoi aku ka lōʻihi ma mua o nā mea hoʻopaʻa ʻole ʻia a i uhi ʻia paha.

4. Nā Pōmaikaʻi Nui o Dacromet Bolts

ʻO ke kūʻokoʻa mai ka hoʻoheheʻe ʻana o ka hydrogen: ʻO nā bolts ikaika kiʻekiʻe, ʻoi aku ka nui o nā papa waiwai 10.9 a me 12.9, hiki ke maʻalahi i ka embrittlement hydrogen ke hoʻokau ʻia i nā kaʻina hana electroplating kuʻuna. ʻO ka lawe ʻana o ka hydrogen atomic i ka wā e hoʻomaʻemaʻe ai i ka ʻakika a i ʻole ka hoʻopaʻa ʻana electrolytic hiki ke alakaʻi i ka haki ʻana o ka brittle ma lalo o ka ukana tensile. Hoʻopau ka ʻenehana hoʻopili ʻo Dacromet i kēia hopohopo no ka mea ʻaʻole pili ke kaʻina hana electrolytic hydrogen a pale pinepine i ka hoʻomaʻamaʻa mua ʻana i ka waika. ʻO ka hopena, hiki i nā ʻenekini ke kuhikuhi i nā bolts Dacromet kiʻekiʻe me ka hilinaʻi ʻaʻole e hoʻopilikia ka pale corrosion i ka hilinaʻi a me ka palekana.

ʻO ka uhi ʻili lahilahi, kūlike, a me ke ʻano paʻa: ʻAʻole e like me ka galvanizing hot-dip, hiki ke waiho i nā papa zinc mānoanoa a i kekahi manawa ʻaʻole e hoʻopilikia i ka pili pono o ke kaula a me nā pilina torque-tension, ʻano lahilahi a ʻaʻahu like ʻole nā uhi Dacromet. ʻO ka mānoanoa kiʻiʻoniʻoni maʻamau 5-15 µm e hōʻoia i ka paʻa ʻana o ka bolt maʻamau a me nā nut tolerances me ka ʻole o ka pono o nā nati nui nui a i ʻole ka ʻoki ʻana i nā kaula. He mea waiwai nui kēia ʻano paʻa i nā hui kikoʻī a me nā hana hoʻopaʻa automated kahi e pono ai nā ukana paʻa paʻa.

Kūleʻa wela maikaʻi a me ka paʻa kemika: Hōʻike nā uhi Dacromet i ke kūpaʻa wela maikaʻi, mālama i ka pale ʻana i ka corrosion maikaʻi a me ka pale ʻana i ka ʻōpala i nā mahana lawelawe hoʻomau a hiki i ka 250-300 ° C, e pili ana i ke ʻano kikoʻī. ʻO kēia kūpaʻa wela e kūpono i nā bolts Dacromet no nā noi kokoke i nā ʻenekini, nā ʻōnaehana exhaust, nā umu ʻoihana, a me nā wahi wela kiʻekiʻe kahi e hoʻohaʻahaʻa ai nā uhi kūlohelohe. Hoʻohui ʻia, ʻo ke ʻano inorganic o ka uhi e hāʻawi i ke kūpaʻa maikaʻi i ka nui o nā kemika ʻoihana.

ʻO ka hana ʻino a me ka hui ʻana: Nui nā ʻōnaehana Dacromet e hoʻokomo i nā mea sila a i ʻole lubricants kūikawā e ʻae i ka mana pololei ma luna o ka coefficient o friction. He mea koʻikoʻi kēia hiʻohiʻona no ka loaʻa ʻana o ka preload maʻamau i nā hui bolted. Ma ka hāʻawi ʻana i ka hana torque-tension hiki ke ʻike ʻia, kākoʻo ʻo Dacromet bolts i nā kaʻina hui pono a hoʻemi i ka pilikia o lalo a i ʻole ka paʻa ʻana. ʻO ka hui pū ʻana o ka pale corrosion maikaʻi loa, nā ʻano friction paʻa, a me ke kūʻokoʻa mai nā kūlana embrittlement hydrogen ʻo Dacromet ma ke ʻano he lapaʻau ʻili i makemake ʻia no nā mea paʻa palekana-koʻikoʻi a me ka hana kiʻekiʻe.