I-DACROMET BOLTS

2026-11-07

1. Isingeniso

Ebunjiniyela besimanje, amajoyinti aboshwe kufanele amelane nemithwalo yemishini kanye nokugqwala kwemvelo. I-electro-galvanizing evamile kanye ne-hot-dip galvanizing kunikeza ukuvikeleka kokugqwala kodwa kuhlushwa i-hydrogen embrittlement kumabhawodi anamandla aphezulu kanye nokuphazamiseka kobukhulu emicucu enembayo. I-Dacromet coating, uhlelo lwe-zinc-aluminium flake olwakhiwa ngawo-1970, lunqoba le mikhawulo. Iletha ukumelana nokugqwala okuvelele, iqeda ubungozi be-hydrogen embrittlement, igcina ubukhulu bentambo, futhi inikeza ukuqina kwezinga lokushisa elifinyelela ku-300 °C. Amabhawodi e-Dacromet manje asecaciswe kabanzi ezimbonini zezimoto, ezokwakha, zamandla omoya, izitimela, nezimboni zasolwandle.

2. Iyini i-Dacromet Coating?

I-Dacromet iyi-non-electrolytic, i-zinc-flake esekelwe emanzini ehlanganiswe ne-zinc-scale kanye nama-aluminium flakes ku-binder ye-inorganic. Ngemuva kokufaka nokuphulukiswa, ama-flakes agqagqene akha umgoqo ominyene we-multi-layer ohlinzeka kokubili ukuvikelwa kwesithiyo kanye nokuvikelwa komhlatshelo kwe-cathodic ku-substrate yensimbi.

Izici ezibalulekile:

Ugqinsi lwefilimu: ngokuvamile luyi-5–12 μm (lincane kakhulu kune-hot-dip galvanizing)
Ukubukeka: iyunifomu yesiliva-grey metallic finish
Ayikho ingozi ye-hydrogen embrittlement (ayikho i-acid pickling noma i-electrolysis)
Ukumelana nokugqwala: imvamisa > amahora ayi-1,000 kasawoti fafaza ukugqwala okubomvu (ASTM B117)
Ukumelana nezinga lokushisa eliphezulu kufika ku-300 °C isevisi eqhubekayo

I-coating isetshenziswa nge-dip-spin (evamile ezixhunyweni eziningi), isifutho, noma i-dip-drain, bese yelapheka ngokushisa ku-~300 °C. Amajazi angaphezulu angakhethwa athuthukisa ukumelana nokugqwala futhi alawule i-coefficient of friction ngokusebenza okungaguquki kwe-torque-tension.

3. Uhlolojikelele Lwenqubo Yokuhlanganisa

Inqubo evamile yamabhawodi inezigaba ezine eziyinhloko:

1. Ukulungiswa komphezulu: Ukukhishwa kwe-alkaline kulandelwa ukuhlanzwa ngomshini uma kudingeka. I-Acid pickling igwenywa ukuvimbela ukumuncwa kwe-hydrogen.

2.Ukufaka isicelo: Izingxenye zicwiliswe ku-aqueous zinc-aluminium flake slurry (dip-spin for bolts amancane) noma zifuthwe; okweqile kususwa nge-centrifugation ukuze kube ukushuba okufanayo.

3. Ukwelapha: Ukubhaka cishe ku-300-320 °C kuguqula i-binder futhi kuhlanganiswe ama-metallic flakes ibe i-inorganic coating eboshwe ngokuqinile.

4.I-Topcoat/Sealer ozikhethela yona: Isivalo esincanyana sithuthukisa ukuthambisa, ukumelana namakhemikhali, futhi sandise ukusebenza kwesifutho sikasawoti.

Ngenxa yokuthi le nqubo ayinayo i-electrolytic futhi ayinayo i-acid pickling, amabhawodi anamandla amakhulu (iBanga lesi-8.8, i-10.9, i-12.9 ne-ASTM A490) angambozwa ngaphandle kwengozi ye-hydrogen embrittlement yangaphakathi-inzuzo ebalulekile yokuphepha ngaphezu kwe-electroplating yendabuko.

4. Izinzuzo ezibalulekile ze-Dacromet Bolts

4.1 I-Superior Corrosion & Anti-Rust Performance

Ifilimu elincanyana le-Dacromet (6–10 μm) livamise ukumelana namahora angu-1,000–2,000 wokuhlolwa kwesifutho sikasawoti esingathathi hlangothi ngaphambi kokuba kuvele ukugqwala okubomvu—okuphindwe ka-7–10 kune-electro-galvanizing evamile. Isakhiwo se-multi-layer flake sinikeza ukuvikelwa kwesithiyo kuyilapho ama-zinc flakes eletha ukuvikelwa komhlatshelo kwe-cathodic. I-Chromate passivation iqhubeza ibambezela ukugqwala futhi inikeza ukuziphilisa okulinganiselwe emiklwelweni emincane.

4.2 Akukho I-Hydrogen Embrittlement

Amabhawodi anamandla aphezulu asengozini enkulu yokuhoxiswa kwe-hydrogen kusuka ekukhetheni i-asidi kanye ne-electroplating, engabangela ukuphuka kwe-brittle ukubambezeleka. I-Dacromet iqeda le ngozi ngokuphelele. Ngakho-ke kukhethwa izinsimbi eziqinile eziqinile ezinjinini zezimoto, i-chassis, insimbi yesakhiwo, namaassembly ahlobene nokuphepha.

4.3 Ukunemba Kobukhulu & I-Thread Fit

Ngogqinsi oluyi-5-12 μm kuphela, i-Dacromet ayishintshi kakhulu i-geometry yentambo. Amantongomane ajwayelekile angasetshenziswa ngaphandle kokuthepha ngokweqile. Ngokuphambene, i-hot-dip galvanizing (40-80 μm) ngokuvamile idinga amantongomane akhethekile. Lokhu kunamathela okuncane okuhambisanayo kulungele amabhawodi anemba kanye nezinsimbi zokubopha kahle.

4.4 Ukumelana Nokushisa Okuphezulu & Ukungqubuzana Okulawulwayo

I-Dacromet ihlala izinzile kufika ku-300 °C isevisi eqhubekayo, ngaphezu kwemikhawulo ye-electroplating (~120 °C) noma i-hot-dip galvanizing (~200 °C). Ngamajazi aphezulu afanele i-coefficient yokungqubuzana ingalawuleka (imvamisa engu-μ = 0.10–0.18), iqinisekise ukulayisha okungaguquki kwe-clamp nokuziphatha okuthembekile kokuqinisa okuningi.

5. Ukuqhathanisa Ukusebenza

Ithebula elingezansi lifingqa umehluko oyinhloko phakathi kwe-Dacromet kanye nokwelashwa okujwayelekile kwendawo okujwayelekile kwamabhawodi:

Imethrikhi yokusebenza	I-Dacromet	I-Electro-Galvanizing	I-Hot-Dip Galvanizing
Ukuqina Okujwayelekile	5–12 μm	5–15 μm	40–80+ μm
Isifutho sikasawoti (ukuya ekugqwaleni okubomvu)	1,000–2,000+ h	100–300 h	500–1,000 h
H₂ Ingozi Yokutholwa	Lutho	Phezulu (idinga ukubhaka)	Maphakathi
I-Max Continuous Temp.	≈ 300 °C	≈ 100–120 °C	≈ 200 °C
Ukuphazanyiswa kochungechunge	Okuncane / Akukho	Phansi	Okubalulekile
Amabhawodi Amandla Aphakeme	Kuhle kakhulu (8.8–12.9)	Kunomkhawulo / Kuyingozi	Inomkhawulo
Ukubukeka	Iyunifomu yesiliva-grey	I-zinc ekhanyayo noma eluhlaza okwesibhakabhaka	Okubi, okumpunga okufiphele

Ithebula 1: Ukusebenza okuqhathaniswayo kokwelashwa kwendawo yebhawodi evamile

I-Dacromet inikeza inhlanganisela evelele yefilimu elincanyana, ukumelana nokugqwala okukhulu, ingozi ye-hydrogen embrittlement eyiziro, namandla okushisa aphezulu—okuyenza ithandeke ezinhlelweni eziningi zokuzibopha ezifuna ngamandla.

6. Izicelo Ezijwayelekile

Amabhawodi ane-dacromet asetshenziswa kakhulu lapho ukuvikela ukugqwala, ukuphepha, nokunemba kobukhulu kubalulekile:

Izimoto Nezokuthutha: Injini, i-chassis, i-suspension ne-fasteners yomzimba (ikakhulukazi iBanga 10.9/12.9).
Amandla omoya namandla: Umbhoshongo, i-nacelle kanye namabhawodi esisekelo endaweni yasogwini noma yezimboni.
Uloliwe kanye nengqalasizinda: Landelela izinto zokubopha, amabhuloho nokuxhumana kwesakhiwo okudinga impilo ende yesevisi.
Ukwakhiwa Nezakhiwo Zensimbi: Amabhawodi esakhiwo aqine kakhulu lapho ukucwebezela kungafuneki.
I-Marine & Offshore: Izingxenye ezivezwe kwisifutho sikasawoti kanye nomswakama ophezulu (ngokuvamile ngamajazi angaphezulu athuthukisiwe).
Izisetshenziswa Zezolimo Nezisindayo: Imishini esebenza enhlabathini ebolayo noma ezindaweni ezingaphandle.

7. Amazinga Abalulekile Nemihlahlandlela Yokukhetha

I-Dacromet nezinye izigqoko ze-zinc-flake ezifanayo zimbozwe izindinganiso zamazwe ngamazwe ezihlanganisa i-ISO 10683 (Izingqimba - izigqoko ze-zinc flake ezingasebenzisi ngogesi), EN 13858, ASTM F1136/F1136M, nezindlela zokufutha usawoti ASTM B117 / ISO 9227. Izidingo eziningi ze-automobile ze-OEMic futhi zigcina i-OEMic yemoto ethile.

Lapho ucacisa amabhawodi e-Dacromet, onjiniyela kufanele bacabangele:

Ibanga Lamandla: Ilungele u-8.8 nangaphezulu; ngokuvamile kuyimpoqo kuzingxenye ezibucayi zokuphepha ezingu-10.9/12.9.
Ikilasi lokugqwala: Khetha isisindo sokumboza, inani lamajazi kanye nejazi langaphezulu ngokuya ngokusebenza okudingekayo kwe-salt-spray noma ukuhlolwa kwe-cyclic.
I-Friction Coefficient: Cacisa ijazi langaphezulu le-lubricity elilawulwayo uma ukubopha okungaguquki kubalulekile.
Imvelo: Kuhle kakhulu ezimbonini, ezezimoto nasezindaweni eziningi zangaphandle; hlola izinhlelo ezijiyile zokuchayeka olwandle ngokwedlulele.
Izindleko vs. Life-Cycle: Izindleko zeyunithi eziphakeme kune-zinc plating eyisisekelo zivame ukuncishiswa impilo ende yesevisi kanye nokunakekelwa okuphansi.

8. Isiphetho

Amabhawodi e-Dacromet amele isixazululo esivuthiwe, esisebenza kahle kakhulu sokuvikela ukugqwala kwezinsimbi. Icwecwe elincanyana le-zinc-aluminium linikeza ukumelana nesifutho sikasawoti okuphakeme kakhulu kunokwejwayelekile kwe-electro-galvanizing, kuqeda ubungozi be-hydrogen embrittlement esongela amabhawodi anamandla, igcina ubukhulu bentambo obunembile, futhi imelana nezinga lokushisa elifinyelela ku-300 °C.

Konjiniyela nabathengi abafuna ukusebenza okuthembekile kokuqeda ukugqwala nokunqanda ukugqwala kwezimoto, izakhiwo, amandla nezimboni, amabhawodi ahlanganiswe ne-Dacromet anikeza ibhalansi efakazelwe yokuqina, ukuphepha kanye nobuqotho bobukhulu. Uma kucaciswe kahle—ukuqhathanisa izinga lokumboza, ijazi eliphezulu kanye nezakhiwo zokungqubuzana endaweni yesevisi—zifaka isandla ekuphileni kwengxenye ende, ukugcinwa okuncishisiwe kanye nokwethenjwa kwesistimu jikelele okuthuthukisiwe. Njengezidingo zamandla aphakeme, izinsimbi ezihlala isikhathi eside ziyaqhubeka nokukhula, ukumbozwa kwe-zinc-flake okufana ne-Dacromet kuhlala kuyitshe legumbi lobunjiniyela besimanje be-fastener surface.

Okwedlule. Okulandelayo.

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