ʻO Dacromet Hexagonal Bolts-He hoʻolauna piha i nā mea paʻa kiʻekiʻe. 

2. He aha ka Dacromet Coating?

ʻO Dacromet kahi ʻōnaehana hoʻoheheʻe inorganic i haku ʻia me nā flakes zinc ultra-fine, ka pauka alumini, a me kahi mea hoʻopili chromium (a i ʻole chromium-free). Hoʻohana ʻia e like me ka hoʻopuehu ʻana i ka wai a hoʻōla ʻia ma kahi o 300 ° C, hana ia i kahi mea hoʻopaʻa amorphous e hoʻopili ai i nā ʻāpana metala i loko o kahi kiʻiʻoniʻoni pale paʻa. ʻO ka mānoanoa o ka uhi maʻamau he 4-8 μm wale nō — ʻoi aku ka lahilahi ma mua o ka galvanizing hot-dip (50-80 μm)—eia naʻe, hāʻawi ia i ka pale ʻoi aku ka maikaʻi. ʻO ka ʻili i hoʻopau ʻia he ʻano metala hina-hinahina.

haku haku: zinc flakes (60–80%) no ka pale ʻana i ka mōhai, ka pauka aluminika (5–15%) no ka hoʻomaikaʻi ʻana i nā waiwai pale, kahi mea hoʻopili inorganic e hoʻoheheʻe i ka ʻili, a me ka wai deionized ma ke ʻano he mea lawe.

3. Nā Pōmaikaʻi Nui o Dacromet Hexagonal Bolts

3.1 Kū'ē Kū'ē Kū'ē

ʻO ka 4-8 μm Dacromet coating e kū maʻamau ma mua o 1,000-1,200 mau hola o ka hoʻāʻo ʻana i ka paʻakai paʻakai kūʻokoʻa (ASTM B117) me ka ʻulaʻula ʻole-ma kahi o 7 a 10 mau manawa ka hana o ka electro-galvanizing (100-300 hola). Hiki i nā māka hana kiʻekiʻe ma mua o 2,000 mau hola. Hoʻohana ʻia ka ʻōnaehana flake multi-layered ma ke ʻano he pale kino a me kahi anode mōhai, e hāʻawi ana i ka pale no ka wā lōʻihi ma nā kahakai, ʻoihana, a me ke alanui-paʻakai.

3.2 Kūʻokoʻa mai ka Embrittlement Hydrogen

Hoʻokomo ʻia ka electroplating maʻamau i ka pickling acid a me ka electrolysis, hiki ke hoʻokomo i ka hydrogen i loko o ke kila ikaika a hiki ke hoʻopaneʻe i ka haʻihaʻi haʻihaʻi—koʻikoʻi loa no nā bolts Grade 10.9 a me 12.9. Hoʻohana wale ke kaʻina hana Dacromet i ka hoʻomaʻemaʻe mechanical a me ka noi non-electrolytic, e hoʻopau loa i ka pilikia embrittlement hydrogen. ʻO ia ka mea i koho ʻia no ka palekana-koʻikoʻi kiʻekiʻe-tensile hexagonal bolts.

3.3 Kūleʻa Wela Kūikawā

Noho paʻa a pale ʻia nā uhi Dacromet ma nā wela mau a hiki i 300°C. Hoʻomaka ka hoʻohaʻahaʻa ʻana o nā uhi zinc maʻamau ma luna o 70-100°C a hiki ke ʻili ma 200-300°C. ʻO kēia paʻa wela ka mea e kūpono ai nā bolts hexagonal Dacromet no nā keʻena mīkini, nā ʻōnaehana hoʻopau, a me nā ʻenehana wela kiʻekiʻe.

3.4 ʻO ka paʻa ʻana o ka nui a me ka hoʻohālikelike ʻana i ka thread

ʻAʻole hiki ke hoʻololi i ka nui o ke kaula a i ʻole ke anawaena o ka pitch. Hoʻohui maikaʻi nā nati me ka ʻole o ka paʻi nui ʻana i koi pinepine ʻia ma hope o ka galvanizing hot-dip. Hoʻokomo pū ka uhi i nā lua hohonu, nā recesses, a me nā ʻili o loko i hiki ʻole i ka electroplating ke pale pono. Eia kekahi, hoʻopaʻa paʻa ka kiʻiʻoniʻoni i ka substrate a ʻae i nā mea hoʻonaninani kūlohelohe a i ʻole nā ​​​​pena me ka adhesion maikaʻi loa.

4. Ka Hana Hana a me ke Kaʻina Hana

Hoʻopuka pinepine ʻia nā bolts Hexagonal mai ke kalapona waena a i ʻole ke kila kila ma ke poʻo anu a i ʻole ka hoʻoheheʻe wela, a ukali ʻia e ka ʻōwili ʻana i ka milo a me ka mālama wela no ka loaʻa ʻana o ka papa waiwai i makemake ʻia (maʻamau 8.8, 10.9, a i ʻole 12.9). Ma hope o ka hoʻomaʻemaʻe hoʻomaʻemaʻe, hoʻohana ʻia ka uhi Dacromet penei:

1. Ka hoʻomākaukau ʻana o ka ʻili: ʻO ka hoʻomaʻemaʻe ʻana i ka alkaline a me ka hoʻomaʻemaʻe abrasive mechanical (ʻaʻohe pickling acid).

2.Coating palapala noi: ʻO ka luʻu ʻana i ka wili no nā mea hoʻopaʻa nui a i ʻole ka pulupulu ʻana no nā ʻāpana nui; hoʻoneʻe ʻia e ka centrifugation.

3. Ho'ōla: E kālua ʻia ma kahi o 300–320°C no 15–30 mau minuke e hana i ke ʻano o ka flake pale.

4. ʻO ka topcoat koho: Hiki ke hoʻohana ʻia kahi sealer a i ʻole lubricant e hoʻoikaika i ka pale ʻana i ka corrosion a kāohi i ka coefficient o friction.

5. Nā noi maʻamau

Hōʻike nui ʻia nā bolts hexagonal Dacromet kahi e pono ai ka hilinaʻi lōʻihi ma lalo o nā kūlana corrosive a i ʻole ka wela wela.

Kaʻa: ʻO Chassis, hoʻokuʻu ʻia, nā ʻōnaehana kaʻa, nā ʻāpana ʻenekini, a me nā ʻāpana o lalo o ke kino i ʻike ʻia i ka paʻakai alanui.

Ka makani makani a me ka hoʻoili mana: ʻO nā wili hale kiaʻi a me nā mea hoʻopaʻa hoʻopaʻa ʻana ma luna o nā turbine makani kahakai.

Kai a me waho: ʻIke ʻia nā lako paʻa paʻa a me nā papa hana i ka wai paʻakai mau.

Kūkulu a me nā ʻoihana: ʻO nā pilina paʻa kila, nā ʻāpana uwapo, a me nā ʻokoʻa o waho.

Kaʻaahi, mīkini kaumaha, aerospace & pale: ʻO nā wahi hoʻopaʻa ikaika kiʻekiʻe e pili ana i ka vibration, weather, a me ke koʻikoʻi mechanical.

6. Hoʻohālikelike me nā ʻāpana kuʻuna

Hōʻike nā ʻokoʻa hana koʻikoʻi i ke kumu i makemake ʻia ai ʻo Dacromet no nā bolts hexagonal kiʻekiʻe.

Mānoanoa uhi: Dacromet 4–8 μm  |  Electro-galvanizing 5–15 μm  |  50-80 μm ka hoʻoheheʻe wela

Ka pale ʻana i ka paʻakai (ʻaʻohe ʻula ʻula): Dacromet ≥1,200 hola |  Electro-galvanizing 100–300 h  |  Luu wela 500–800 h

ʻO ka pilikia o ka hāʻule ʻana o ka hydrogen: Dacromet – ʻAʻohe  |  Electro-galvanizing – Kiekie  |  Luʻu wela - Medium

Palena wela kiʻekiʻe: Dacromet a hiki i 300°C  |  Electro-galvanizing ≤100°C  |  Luu wela ≤200°C

Kūpono ka pae: Mālama ʻo Dacromet i nā ʻae pololei; ʻO ka galvanizing wela e koi pinepine i ka uku pili.

7. Nā Kūlana, Nā Papa, a me nā kiko'ī

Hana ʻia nā bolts hexagonal Dacromet i nā kūlana honua me ISO 4014/4017, DIN 931/933, ANSI/ASME B18.2.1, a me GB/T 5782/5783. ʻO nā papa waiwai maʻamau he 4.8, 8.8, 10.9, a me 12.9 (metric) a i ʻole Papa 5 a me ka Papa 8 (ʻīniha). Loaʻa nā mea waiwai i ke kila kalapona a me nā kila kila e like me 35CrMo, 40Cr, a me 42CrMo. ʻO ka laulā maʻamau ka M5 a i ka M36 (nā nui nui i loaʻa no nā noi kūikawā), i ka hoʻonohonoho piha a i ʻole ka ʻāpana. He nui nā OEM kaʻa e papa inoa iā Dacromet a i ʻole nā ​​mea like me ka zinc-flake coatings e like me ka hoʻopau ʻana no nā mea hoʻopaʻa ikaika kiʻekiʻe.

8. Noonoo Kaiapuni

Loaʻa i nā hana Dacromet kuʻuna hexavalent chromium i loko o ka mea hoʻopili. ʻOiai ua kūpaʻa ka uhi hoʻōla a hoʻohua ʻia ka wai ʻino ma mua o ka electroplating, ua alakaʻi nā lula kaiapuni i ka hoʻomohala ʻana i nā koho chromium-free e like me Geomet® a me nā ʻōnaehana zinc-flake hou. Mālama kēia i nā pono hana koʻikoʻi o Dacromet i ka wā e hālāwai ai i nā koi koʻikoʻi RoHS a me REACH.

Ma ke ʻano holoʻokoʻa, ʻoi aku ka maikaʻi o ke kaʻina hana Dacromet ma mua o ka electro-galvanizing maʻamau no ka mea e hoʻopau ana i ka wai ʻauʻau, cyanide solutions, a me ka mālama ʻana i ka wai ʻino nui. ʻO ke kemika hoʻokumu ʻia i ka wai ka hopena i nā mea hoʻoheheʻe haʻahaʻa haʻahaʻa (VOC).

9. Ka hopena

Hāʻawi nā bolts hexagonal Dacromet i kahi hopena hana kiʻekiʻe no nā noi e koi ana i ka hilinaʻi mechanical a me ka pale corrosion lōʻihi. ʻO kā lākou hui pū ʻana o kahi uhi ʻoi loa ʻoi aku ka ʻoi aku ka maikaʻi, kūʻokoʻa piha mai ka hydrogen embrittlement, kūpaʻa wela maikaʻi loa, a me ka mana kikoʻī kikoʻī e waiwai nui ai lākou no nā mea hoʻopaʻa ikaika kiʻekiʻe i nā ʻāpana automotive, ikehu, moana, a me ka ʻenehana.

Ke ulu nei nā hoʻoponopono kaiapuni, hoʻomau ka hoʻonui ʻana i ka nui o nā koho kūpono ʻole ka chromium-free zinc-flake i loaʻa mai ka ʻenehana Dacromet kumu. Inā i kuhikuhi ʻia ʻo Dacromet maʻamau a i ʻole ka mea like hou, ʻo kēia mau bolts hexagonal i uhi ʻia e hāʻawi i ka lōʻihi i hōʻoia ʻia e hoʻonui nui i ke ola lawelawe a hōʻemi i nā kumukūʻai mālama i nā kaiapuni corrosive a kiʻekiʻe. No nā hui koʻikoʻi inā ʻaʻole he koho, ʻo Dacromet hexagonal bolts e hoʻomau i kekahi o nā ʻenehana paʻa paʻa paʻa i loaʻa i kēia lā.