Dacromet Flange Bolts

2026-11-09

1. Nhanganyaya

Mumashandisirwo emazuva ano maindasitiri, kutendeseka kwenguva refu kwemajoini akasungwa kunoenderana zvakanyanya nekubudirira kudzivirira ngura uye anti-rust performance. Chinyakare zinc plating uye inopisa-dip galvanizing kazhinji inodonha munzvimbo dzine hukasha dzakadai sezvivakwa zvemahombekombe, mapuratifomu ekumahombekombe, zvidyarwa zvemakemikari, uye mota dzepasi pevhu dzakafumurwa nemunyu wemumugwagwa. Dacromet flange mabhoti sanganisa zvakanakira zvimiro zveflange-musoro dhizaini neyakatanhamara ngura-inodzivirira uye anti-corrosion zvimiro zve zinc-aluminium flake coatings.

Dacromet (inozivikanwawo se zinc flake coating) isiri-electrolytic, mvura-based surface treatment. Inoisa chidimbu chakatetepa asi chinoshanda zvakanyanya chezinc uye aluminium flakes zvakasungwa nechromate matrix, ichiburitsa yakasarudzika. chipingamupinyi chekudzivirira, chibayiro cathodic kudzivirira,uye kuzviporesa passivation. Yakaiswa kune flange mabhaudhi, iyi yekupfeka inopa yakavimbika kwenguva refu kupikisa ngura pasina kukanganisa tambo yakakodzera, torque kunyatsoita, kana kuunza njodzi yehydrogen embrittlement.

Mufananidzo 1. High-simba Dacromet-yakavharwa mabhaudhi ane yunifomu sirivha-grey anti-corrosion kupera

2. Flange Bolts uye Dacromet Coating Technology

Iyo flange bhaudhi inoratidzira yakakosha denderedzwa flange pasi pemusoro wehexagonal inoshanda seyakavakirwa-mukati washer. Iyi dhizaini inogovera clamping simba pamusoro pehombe inotakura nzvimbo, ichidzikisa kukuvadzwa kwepasi uye kunatsiridza kuramba kune vibration-induced kusunungura. Kana mabhaudhi aya achigamuchira Dacromet coating, musanganiswa unoburitsa chisungo chinopa zvese kuvimbika kwemuchina uye nepamusoro. anti-ngura uye corrosion-resistant performance. Iyo yakapfava yakaonda (kazhinji 5-12 μm) inochengetedza chaiyo shinda geometry.

2.1 Coating Maumbirwo uye Maitiro

Dacromet is aqueous dispersion ye zinc flakes, aluminium flakes, uye chromium oxides. Iyo isiri-electrolytic process inowanzobatanidza: (1) kuchenesa pamusoro pasina hukasha asidhi pickling; (2) kushandiswa ne dip-spin, dip-drain kana spray; uye (3) kurapa paanenge 300 ° C kusanganisa maflakes muzvikamu zvakapindirana. Iyo inoguma yesimbi yesirivha-grey firimu inopa akawanda-layer oxidation resistance uye akavimbika mwando chipingamupinyi.

2.2 Nzira dzeKudzivirira Corrosion

Dacromet inowana zvakasarudzika anti-corrosion kushanda kuburikidza nematatu e synergistic maitiro:

Barrier Protection: Kupindirana zinc uye aluminium flakes zvinogadzira labyrinthine chemuviri chipingamupinyi chinotadzisa mvura, okisijeni, uye maion anoparadza sema chlorides.
Chibayiro (Cathodic) Dziviriro: Zinc flakes inonyanya kukanganisa, ichiita sechibairo anode inodzivirira simbi substrate kubva pakuumbwa kwengura.
Passivation uye Kuzviporesa: Chromate makomisheni anoumba firimu rekuita uye anogona kutamira kune madiki makwara, achipa anoenderera kudzivirira ngurauye kugona kuzvigadzirisa.

3. Mabhenefiti Akakosha eDacromet Flange Bolts

Kuenzaniswa neyakajairwa pamusoro pekurapa, Dacromet flange mabhoti inopa yakasarudzika musanganiswa wekuita mabhenefiti:

Superior Salt Spray Resistance: Kazhinji inodarika maawa e1,000-1,200 ekuongororwa kwemunyu wekupfapfaidza (ISO 9227) pasina ngura tsvuku-kazhinji 7-10 nguva dziri nani pane electro-galvanized coatings.
Zero Hydrogen Embrittlement Ngozi: Iyo isiri-electrolytic process inobvisa hydrogen chizvarwa, ichiita kuti Dacromet yakanakira yepamusoro-simba Giredhi 8.8, 10.9, uye 12.9 mabhaudhi.
Mutete, Dimensionally Stable Coating: Kungori 5-12 μm chete, iyo yekupfekedza inochengetedza tambo yechokwadi uye inobvumira akajairwa nzungu kuti ashandiswe pasina kudzvanya zvakare.
Yakanakisa Heat Resistance: Inochengetedza kuvimbika kwedziviriro kusvika ku300 ° C, yakakwirira kwazvo kune yakajairwa zinc coatings iyo inosvibisa pamusoro pe100-200 ° C.
Yakanakisa Weatherability uye Chemical Resistance: Inopikisa maindasitiri emumhepo, munyu wemugwagwa, mild acids uye alkalis apo ichipa kwenguva refu anti-ngurakuita kunze.
Good Friction Control: Iine sarudzo yakaomeswa topcoats, iyo coefficient yefriction inogona kudzorwa zvakasimba kune yakavimbika clamp load.

4. Performance Kuenzanisa neTraditional Coatings

Tafura iri pazasi inopfupikisa misiyano mikuru mukati kudzivirira ngura uye kupfeka maitiro.

Property	Dacromet	Electro-Galvanizing	Hot-Dip Galvanizing
Coating Ukobvu	5–12 μm	5–15 μm	40–80 μm
Salt Spray (hapana tsvuku tsvuku)	≥1,000–1,200 h	100–300 h	500–800 h
Hydrogen Embrittlement	Hapana	Dambudziko guru	Ngozi yepakati
Heat Resistance	Kusvikira ku300°C	≤100°C	≤200°C
Thread Fit Impact	Zvishoma / zvakanakisa	Slight	Kazhinji kunoda kudzokorora

Tafura 1. Kuenzanisa kushanda kweDacromet kunopesana nemagariro ezvinc coatings for fasteners.

5. Typical Applications

Dacromet flange mabhoti anotsanangurwa pese pakakwirira corrosion resistance inofanira kusanganiswa nekuvimbika kwemuchina:

Motokari: Chassis, kumiswa, mabhureki masisitimu uye zvinhu zvepasi zvakafumurwa munyu wemugwagwa.
Mhepo simba & offshore: Shongwe flanges, nacelle magungano uye zvimiro zvinongedzo mu saline atmospheres.
Kuvaka & zvivakwa: Mabhiriji, zvivakwa zvemahombekombe, magadhi anoda nguva refu kudzivirira ngura.
Heavy machine & njanji: Equipment munzvimbo dzine hunyoro kana makemikari ane hukasha uko anti-corrosionkuita kwakakosha.

6. Common Specifications

Dacromet flange mabhoti anogadzirwa kune makuru epasi rose zviyero uye simba mamakisi:

Parameter	Typical Range / Values
Mitemo	DIN 6921, ISO 4162, GB/T 5787 / 5789, ASME B18.2.1
Simba MaGrade	8.8, 10.9, 12.9 (metric); SAE Giredhi 5/8 (inch)
Thread Diameter	M5–M24 (metric); 1/4"–5/8" (umambo)
Length Range	10 mm - 200 mm (kureba kunowanikwa)
Coating Ukobvu	Kazhinji 5–12 μm (Giredhi A / B zvakasiyana)
Chitarisiko	Metallic sirivha-grey (matte)

7. Installation Best Maitiro & Mhedziso

To maximize the anti-corrosion hupenyu hwebasa reDacromet flange bolts: shandisa matching Dacromet-coated nuts uye washers pazvinobvira; tevera akakurudzirwa torque kukosha (inodzorwa friction inotsigira chaiyo clamp load); dzivisa zvakanyanya kukanganisa kwemagetsi panguva yekubata; uye kuchengeta fasteners mumamiriro akaoma usati washandisa.

Mukupfupisa, Dacromet flange mabhoti anomiririra yakakura, yakakwirira-yekuita yekusimbisa mhinduro inobudirira kugadzirisa izvo zviviri zvinodiwa zvemashini kuvimbika uye kwenguva refu. kudzivirira ngura. Nekubatanidza mabhenefiti ekugovera-mutoro weiyo inosanganisirwa flange dhizaini ine yakaonda, inoshanda kwazvo zinc-aluminium flake coating, izvi zvinosungirira zvinounza zvakatanhamara. anti-ngura kuita, kubvisa njodzi dzehydrogen embrittlement, uye chengetedza chaiyo dimensional control.

Munzvimbo umo magadzirirwo emagetsi emagetsi kana anopisa-dip magalvanized fasteners anotambura nguva isati yakwana. ngura uye kuparara-kumahombekombe, mugungwa, motokari, uye kugadzirwa kwemabhizimisi-Dacromet flange mabhoti anopa imwe nzira yakaratidza, yakasimba. Zvakanakisa zvavo weatherability, oxidation resistance,uye kudzivirira kwechibayiro michina inovimbisa hupenyu hwesevhisi hwakawedzerwa uye kuderedzwa kwemitengo yekugadzirisa, zvichiita kuti ive sarudzo iri kuramba ichidiwa kune mainjiniya nevagadziri pasi rese.