ʻO Dacromet Flange Bolts-Ka Manaʻo Manaʻo 

1. Hoʻolauna

ʻO nā bolts flange Dacromet he mau mea hoʻopaʻa ikaika kiʻekiʻe e hui pū ana i kahi hoʻolālā poʻo flanged me kahi ʻāpana zinc-aluminum flake kiʻekiʻe i kapa ʻia ʻo Dacromet (i kapa ʻia ʻo zinc-chromium coating). ʻO ka flange i hoʻohui ʻia ma lalo o ke poʻo e puʻunaue like i ka ukana pipili, hoʻonui i ka ʻili o ka halihali, hoʻomaikaʻi i ke kūʻē ʻana i ka haʻalulu i hoʻoiho ʻia, a hoʻopau pinepine i ka pono no kahi holoi ʻokoʻa.

Hoʻokumu ʻia i ka makahiki 1970 ma ke ʻano he hana kiʻekiʻe i ka electroplating maʻamau a me nā uhi cadmium, ua lilo ka ʻenehana Dacromet i mea lapaʻau maikaʻi loa no ka papa 8.8, 10.9 a me 12.9 bolts. Hoʻohana nui ʻia kēia mau mea hoʻopaʻa i nā chassis automotive a me nā hui powertrain, nā hale makani-turbine, nā ʻoihana mahiʻai a me nā mīkini hana, nā mea hana kemika, nā mea hoʻokomo kai a me nā ʻenehana kila waho kahi e koʻikoʻi ai ke kūpaʻa corrosion lōʻihi.

Kiʻi A. Hōʻike makamaka o Dacromet-coated hex flange bolts (metallic silver-gray finish).

2. He aha ka Dacromet Coating?

ʻO ka Dacromet kahi mea hoʻopili non-electrolytic, wai-based inorganic i loko o ka zinc flakes, alumini flakes a me chromium pūhui (a i ʻole chromium-free binders hou) i hoʻopuehu ʻia i loko o kahi matrix kūikawā. Hoʻohana ʻia ka uhi ʻana e nā ʻano dip-spin, spray a dip-drain a laila hoʻōla wela ma kahi o 300-320 °C. I ka wā o ka mālama ʻana i kahi ʻano lamellar paʻa, hoʻohui ʻia i ka manawa like e hāʻawi i ka pale pale a me ka pale ʻana (cathodic) o ka substrate kila.

ʻO ka mānoanoa kiʻiʻoniʻoni maloʻo maʻamau mai 5 a 12 μm. ʻOiai ka lahilahi, hāʻawi mau ka uhi i nā hola ≥1,000 (maʻamau 1,200-2,000 mau hola no nā ʻōnaehana optimized) o ka pale ʻana i ka hoʻāʻo ʻana i ka paʻakai paʻakai (ASTM B117 / ISO 9227) ma mua o ke ʻano o ka ʻula ʻulaʻula-ma kahi o 7 a 10 mau manawa ka hana o ka mānoanoa electro-galvanizing maʻamau.

3. Nā Pōmaikaʻi Nui

• Kū'ē Kū'ē Kū'ē: ≥1,000–1,500 h paakai paʻakai maʻamau; nā ʻano hana kiʻekiʻe ma mua o 2,000 h.
• ʻO ka pilikia o ka hoʻoheheʻe ʻia ʻana o ka hydrogen: ʻAʻole hoʻohana ke kaʻina hana i ka pickling acid a i ʻole electrolysis, e palekana ai no nā bolts kiʻekiʻe (Papa 10.9+).
• Hiki i ka Mahana Kiekie: Mālama ʻia ka hana pale a hiki i ka 300 °C.
• Ka Mana Mana Mana Loa: Mālama ʻia ke kiʻi ʻoniʻoni ʻaʻahu lahilahi; ʻaʻole pono i nā hua nui.
• Nā Pōmaikaʻi Hoʻolālā Flange: ʻO ka hāʻawi ʻana i ka ukana, hoʻemi ʻia ke kaomi ʻili a hoʻomaikaʻi i ke kūpaʻa vibration.
• ʻIkepili Kaiapuni maikaʻi: Kemika hoʻokumu wai me ka hoʻohana ʻana i ka puka pani a me nā kahawai ʻōpala i hoʻemi ʻia.

4. Hoʻohālikelike Hoʻohālikelike me nā Kāpena Kuʻuna

5. Ka Hana Hana & Hoʻopili

ʻO ke kaʻina hana maʻamau: ka hoʻomaʻemaʻe alkaline a me ka degreasing; ka hoʻoheheʻe ʻana i ka mīkini a i ʻole ka hoʻoheheʻe ʻia ʻana (ua ʻae ʻia ka ʻai ʻana i ka waikawa); ka hoʻohana ʻana i ka slurry zinc-flake ma ka dip-spin a i ʻole ke kāpī ʻia; ka ho'ōla wela ma 300-320 °C; ka hoʻohana ʻana i kahi kapa lubricated a pale paha; a me ka hooluolu hope me ka nana ana. Hoʻohana pinepine ʻia nā noi basecoat ʻelua e hiki ai i ka mānoanoa a me ka pae hana. ʻO nā mana koʻikoʻi e pili ana i ka maʻemaʻe o ka ʻili, ka slurry viscosity, nā ʻāpana wili, ka like ʻana o ka wela o ka umu ahi a me ka hōʻoia ʻana i ka paona paona hope.

6. Nā noi maʻamau

• Kaʻa a me ka lawe ʻana: ʻO Chassis, hoʻokuʻu, ʻenekini a me nā mea hoʻopaʻa ʻōnaehana brake i hōʻike ʻia i ka paʻakai alanui, ka haʻahaʻa a me ke kaʻa kaʻa wela.
• Ike makani makani: ʻO ka hale kiaʻi a me nā kumu kumu no nā turbine uka a me waho e pono e hoʻomanawanui i nā makahiki he nui i ka lewa paʻakai me ka mālama liʻiliʻi.
• Mīkini Mahiai a kūkulu: ʻO nā lako hana i loko o nā kaiapuni i loaʻa i ka makū, nā mea kanu, ka lepo abrasion a me ke aniau waho.
• ʻOihana Kimia & Kaʻina Hana: ʻO nā pili flange a me nā mea hoʻopaʻa hana i nā mea kanu e mālama ana i nā wai corrosive a i ʻole nā lewa.
• Infrastructure & Marine: ʻO nā alahaka, nā hale kiaʻi hoʻouna, nā hale kahakai, nā lako awa a me nā paepae waho.

Kiʻi 4. Nā ikaika hana pili o nā ʻano Dacromet nui.

7. Nā Kūlana, Nā Papa & Ke alakaʻi koho

ʻO nā maʻamau maʻamau i kuhikuhi ʻia ʻo DIN 6921 a me ISO 4162 (hexagon flange bolts) me nā kūlana aupuni like e like me GB/T 5787. ʻO nā papa waiwai mīkini i hoʻolako pinepine ʻia me ka uhi Dacromet he 8.8, 10.9 a me 12.9 e like me ISO 898. Hōʻike maʻamau ka hana ʻana o ka uhi ʻana ma ke kaumaha o ka uhi ʻana (Papa A ≈ 24 g/m², Papa B ≈ 36 g/m²) a i ʻole ma ka helu haʻahaʻa o nā hola paʻakai. Nui nā OEM kaʻa a me nā kikoʻī kikoʻī e makemake nui i nā ʻōnaehana zinc-flake no nā bolts ikaika kiʻekiʻe ma muli o ka hoʻopau ʻana i ka pilikia hydrogen-embrittlement.

Nā ʻōlelo aʻoaʻo koho maʻamau:

1. E koho i ka papa hana uhi e like me ka waeʻano corrosivity kaiapuni i manaʻo ʻia (ISO 9223 C3–C5 a i ʻole).
2. No ka Papa 10.9 a i luna, e kuhikuhi i ka Dacromet a i ʻole ka hoʻopili zinc-flake like ma mua o ka hoʻopalapala uila maʻamau.
3. Ke koʻikoʻi ka pololei o ka torque hui a i ʻole ka hana hoʻopaʻapaʻa nui, e noi i kahi kapa pale-friction controlled (coefficient maʻamau o ka friction 0.10–0.18).
4. E hoʻopaʻa a hoʻokomo pono i nā bolts e pale aku i ka pōʻino mechanical i ke kiʻiʻoniʻoni i uhi ʻia.

8. Ka hopena

Hāʻawi ʻo Dacromet flange bolts i kahi kaulike maikaʻi loa o ka ikaika mechanical kiʻekiʻe, ka pale ʻana i ka corrosion lōʻihi, ka pololei dimensional a me ka palekana hana. Ma ka wehe ʻana i ka pilikia o ka hydrogen embrittlement a me ka hāʻawi ʻana i ke ola lawelawe ʻana i nā makahiki he nui i loko o nā kaiapuni koʻikoʻi, hoʻemi lākou i nā kumukūʻai mālama a hoʻonui i ka hilinaʻi o ke kūkulu ʻana ma waena o nā ʻoihana automotive, renewable-energy, ʻenehana a me nā ʻoihana. ʻO ka wehewehe kikoʻī o ka papa mechanical e pono ai, dimensional standard, coating performance class a me nā koi topcoat e hōʻoia i ka hana ʻana o nā mea paʻa e like me ka mea i manaʻo ʻia i ko lākou ola lawelawe.