DACROMET BOLTS

2026-11-07

1. Okwu mmalite

N'ime injinia ọgbara ọhụrụ, nkwonkwo kpọchiri akpọchi aghaghị iguzogide ma ibu ọrụ yana mmebi gburugburu ebe obibi. Omenala electro-galvanizing na na-ekpo ọkụ-mikpu galvanizing na-enye mgbochi mgbochi nchara ma na-ata ahụhụ site hydrogen embrittlement na elu bolts ike na akụkụ nnyonye anya na nkenke eri. Ihe mkpuchi dacromet, usoro flake zinc-aluminom mepụtara na 1970s, meriri oke ndị a. Ọ na-ewepụta nguzogide corrosion pụtara ìhè, na-ewepụ ihe egwu embrittlement hydrogen, na-echekwa akụkụ eri, ma na-enye nkwụsi ike dị elu ruo 300 Celsius. A na-akọwapụta bolts Dacromet ugbu a na ụgbọ ala, ihe owuwu, ike ikuku, ụgbọ okporo ígwè, na ụlọ ọrụ mmiri.

2. Gịnị bụ mkpuchi Dacromet?

Dacromet bụ ihe na-abụghị electrolytic, mmiri nke dabeere na zinc-flake mkpuchi nke nwere micron-scale zinc na flakes aluminom na eriri inorganic. Mgbe ngwa na ọgwụgwọ gasịrị, flakes na-ekpuchi ekpuchi na-etolite ihe mgbochi dị iche iche nke na-enye ma mgbochi mgbochi yana nchebe cathodic ịchụ àjà na ngwongwo ígwè.

Njirimara isi:

Ọkpụrụkpụ ihe nkiri: ọ na-adịkarị 5-12 μm (dị gịrịgịrị karịa galvanizing na-ekpo ọkụ)
Ọdịdị: edo edo ọlaọcha-isi awọ dara
Enweghị ihe ize ndụ mgbakasị hydrogen (enweghị pickling acid ma ọ bụ electrolysis)
Nguzogide corrosion: mgbe mgbe> 1,000 awa nnu na-efesa nchara uhie (ASTM B117)
Nguzogide okpomọkụ dị elu ruo 300 Celsius C na-aga n'ihu

A na-etinye ihe mkpuchi ahụ site na dip-spin (nke a na-ahụkarị maka nnukwu ngwa ngwa), ịgbasa, ma ọ bụ nsị-mmiri, wee gwọọ okpomọkụ na ~ 300 Celsius. Nhọrọ topcoats na-eme ka nguzogide corrosion dịkwuo elu ma na-achịkwa ọnụọgụ nke esemokwu maka ịrụ ọrụ torque-tension na-agbanwe agbanwe.

3. Nchịkọta Usoro mkpuchi

Usoro a na-ahụkarị maka bolts nwere usoro anọ bụ isi:

1. Nkwadebe elu: Mbelata alkaline na-esote site na nhicha igwe ma ọ bụrụ na ọ dị mkpa. A na-ezere pickling acid iji gbochie mmịpụta hydrogen.

Ngwa mkpuchi 2. A na-etinye akụkụ n'ime mmiri mmiri zinc-aluminom flake slurry (mikpu-spin maka obere bolts) ma ọ bụ fesa; A na-ewepụ ngafe site na centrifugation maka otu ọkpụrụkpụ.

3. Ngwọta: Ime achịcha na ihe dịka 300-320 Celsius na-atụgharị ihe nkedo ma mee ka flakes ndị ahụ dara ka ọ bụrụ mkpuchi inorganic jikọtara nke ọma.

4. Nhọrọ Topcoat / Sealer: Ihe mkpuchi dị mkpa na-eme ka mmanu mmanu, nguzogide kemịkalụ, ma na-agbatịkwu ọrụ ịgbasa nnu.

N'ihi na usoro a na-abụghị electrolytic na free nke acid pickling, elu-ike bolts (Grade 8.8, 10.9, 12.9 na ASTM A490) nwere ike mkpuchi na-enweghị n'ime hydrogen embrittlement ize ndụ-a oké egwu nchekwa uru n'elu omenala electroplating.

4. Isi uru nke Dacromet Bolts

4.1 Corrosion kacha elu & arụrụ nchara

Ihe nkiri Dacromet dị gịrịgịrị (6-10 μm) na-anagide awa 1,000-2,000 nke nnwale nnu na-anọpụ iche tupu nchara uhie apụta - ugboro 7-10 ka mma karịa electro-galvanizing. Ọdịdị flake nke multi-layer na-enye nchebe mgbochi ebe flakes zinc na-enye nchebe cathodic ịchụ àjà. Passivation nke chromate na-ebelata corrosion ma na-enye ọgwụgwọ onwe onye nwere obere ncha.

4.2 Ọ dịghị Hydrogen Embrittlement

Mgbochi ike dị elu na-enwekarị ike ịnweta hydrogen embrittlement site na acid pickling na electroplating, nke nwere ike ime ka mgbaji na-egbu oge. Dacromet na-ewepụ ihe egwu a kpamkpam. Ya mere, a na-ahọrọ ya maka ihe nkedo dị oke egwu dị elu na injin ụgbọ ala, chassis, nchara nhazi, na mgbakọ metụtara nchekwa.

4.3 Izi ezi akụkụ & dabara adaba

Site na ọkpụrụkpụ mkpuchi nke naanị 5-12 μm, Dacromet anaghị agbanwe geometry eri nke ukwuu. Enwere ike iji mkpụrụ osisi na-enweghị oke ọpịpị. N'ụzọ dị iche, galvanizing na-ekpo ọkụ (40-80 μm) na-achọkarị mkpụrụ pụrụ iche. Ihe mkpuchi conformal a dị gịrịgịrị dị mma maka bolts ziri ezi na ihe nkedo dị mma.

4.4 Nguzogide oke okpomọkụ & esemokwu achịkwara

Dacromet na-anọgide na-akwụsi ike ruo 300 Celsius C na-aga n'ihu na-aga n'ihu, dị elu karịa njedebe nke electroplating (~ 120 ° C) ma ọ bụ galvanizing na-ekpo ọkụ (~ 200 ° C). Na topcoats kwesịrị ekwesị, ọnụọgụ nke esemokwu nwere ike ịchịkwa (nke a bụ μ = 0.10-0.18), na-ahụ na ibu mwekota na-agbanwe agbanwe yana omume na-agbatị ọtụtụ ihe.

5. Ntụle arụmọrụ

Tebụlụ dị n'okpuru na-achịkọta isi ọdịiche dị n'etiti Dacromet na ọgwụgwọ elu ala ọdịnala maka bolts:

Metric arụmọrụ	Dacromet	Electro-galvanizing	Galvanizing na-ekpo ọkụ
Ọkpụrụkpụ a na-ahụkarị	5-12 μm	5-15 μm	40-80+ μm
Nri nnu (na nchara uhie)	1,000–2,000+ h	100-300 h	500–1,000 h
H₂ Embrittlement Risk	Ọ dịghị	Elu (chọrọ ime achịcha)	Ọkara
Oke na-aga n'ihu.	≈ 300 Celsius C	≈ 100-120 Celsius C	≈ 200 Celsius C
Ntinye eriri	Opekempe / Ọ dịghị	Dị ala	Dị mkpa
Bolts dị ike dị elu	Ọ dị mma (8.8-12.9)	Oke/ihe ize ndụ	Oke
Ọdịdị	Uniform ọlaọcha-isi awọ	Zinc na-egbuke egbuke ma ọ bụ na-acha anụnụ anụnụ	Isi ike, isi awọ

Tebụl 1: arụmọrụ atụnyere ọgwụgwọ elu bolt nkịtị

Dacromet na-enye ngwakọta pụtara ìhè nke ihe nkiri dị gịrịgịrị, oke nguzogide corrosion, ihe egwu embrittlement efu hydrogen, yana ike dị elu - na-eme ka ọ masịrị ya maka ọtụtụ ngwa ngwa ngwa na-achọsi ike.

6. Ngwa a na-ahụkarị

A na-eji bolts kpuchie dacromet nke ukwuu ebe nchebe corrosion, nchekwa, na nkenke akụkụ dị oke mkpa:

Ụgbọala & Ụgbọ njem: Injin, chassis, nkwusioru na ihe nkedo ahụ (karịsịa ọkwa 10.9/12.9).
Ike & Ike ikuku: Ụlọ elu, nacelle na ntọala bolts n'akụkụ osimiri ma ọ bụ ụlọ ọrụ mmepụta ihe.
Ụgbọ okporo ígwè & akụrụngwa: Sochie ihe nkedo, àkwà mmiri na njikọ nhazi chọrọ ogologo ndụ ọrụ.
Ihe owuwu na ígwè: Ihe mkpuchi ihe nrụpụta dị elu ebe galvanizing na-adịghị mma.
Mmiri & Mpụga: Ngwa ndị ekpughere na ịgba nnu na oke iru mmiri (na-enwekarị akwa akwa akwa akwa).
Ngwa ọrụ ugbo na nnukwu: Igwe na-arụ ọrụ n'ime ala na-emebi emebi ma ọ bụ n'èzí.

7. Ụkpụrụ dị mkpa & Ntuziaka nhọrọ

Dacromet na ihe mkpuchi zinc-flake yiri nke ahụ bụ ụkpụrụ mba ụwa gụnyere ISO 10683 (ihe mkpuchi - mkpuchi zinc flake na-abụghị nke elektrọnik), EN 13858, ASTM F1136 / F1136M, na ụzọ ịgbasa nnu ASTM B117 / ISO 9227. Ọtụtụ OEM nnwale ụgbọ ala na-echekwa corro n'ụdị chọrọ.

Mgbe ị na-akọwa bolts Dacromet, ndị injinia kwesịrị ịtụle:

Ọkwa Ike: Kwesịrị ekwesị maka 8.8 na elu; mgbe mgbe iwu maka 10.9 / 12.9 nchekwa-dị oke mkpa akụkụ.
Klas corrosion: Họrọ oke mkpuchi, ọnụ ọgụgụ uwe elu na uwe elu dịka ịgbasa nnu ma ọ bụ arụmọrụ cyclic chọrọ.
Ọnụọgụ esemokwu: Ezipụta uwe elu nke nwere mmanu na-achịkwa ma ọ bụrụ na ibu mwekota na-agbanwe agbanwe dị oke mkpa.
gburugburu: Magburu onwe maka ụlọ ọrụ mmepụta ihe, ụgbọ ala na ọtụtụ gburugburu n'èzí; nyochaa usoro ndị siri ike maka mkpughe oke mmiri.
Ọnụ ego vs. okirikiri ndụ: Ọnụ ego otu dị elu karịa ịkwanye zinc bụ isi na-akwụkarị ụgwọ site na ndụ ogologo oge yana mmezi dị ala.

8. Nkwubi okwu

Dacromet bolts na-anọchi anya ihe ngwọta tozuru oke, nke na-arụ ọrụ dị elu maka nchebe corrosion nke ihe nkedo. Ihe mkpuchi flake zinc-aluminom dị mkpa na-ebunye nguzogide nnu-ntụgharị dị elu karịa nke electro-galvanizing nke mbụ, na-ewepụ ihe egwu embrittlement hydrogen nke na-eyi bolts dị elu egwu, na-echekwa akụkụ eriri ziri ezi, ma na-eguzogide okpomọkụ dị elu ruo 300 Celsius.

Maka ndị injinia na ndị na-azụ ahịa na-achọ arụmọrụ mgbochi nchara na mgbochi corrosion a pụrụ ịdabere na ya na ngwa ụgbọ ala, ihe owuwu, ike na ngwa ụlọ ọrụ mmepụta ihe, mkpuchi mkpuchi Dacromet na-enye nguzozi egosipụtara nke ịdịte aka, nchekwa na iguzosi ike n'ezi ihe. Mgbe akọwapụtara ya nke ọma- dabara na ọkwa mkpuchi, uwe elu na ihe mgbagha na gburugburu ọrụ - ha na-enye aka na ndụ akụrụngwa ogologo oge, belata mmezi yana melite ntụkwasị obi sistemụ niile. Dị ka ihe ndị a na-achọ maka ike dị elu, ihe nkedo na-adịte aka na-aga n'ihu na-eto eto, mkpuchi zinc-flake dị ka Dacromet na-anọgide na-abụ isi nkuku nke injinia elu ọgbara ọhụrụ.

Nke gara aga. Na-esote.

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