Dacromet-Coated Hex Bolts

2026-10-27

1. Selelekela

Li-bolts tsa Hex (hexagon head bolts) ke tse ling tsa li-fasteners tse sebelisoang haholo kahong, metjhini, kopano ea likoloi le meaho. Libakeng tse senyang - mehaho e lebōpong la leoatle, limela tsa lik'hemik'hale, litsela tse kholo, marokho le litora tsa tšepe tse ka ntle - bophelo ba ts'ebeletso ea motsoako o entsoeng ka bolt hangata ha bo tsejoe ke matla a tšepe, empa ka ho tšoarella ha tšireletso ea eona.

Ho roala ha Dacromet (hape e tsejoa e le DACROMET, Dacromet zinc-flake coating, kapa zinc-aluminium flake coating) ke seaparo sa metsi sa ho fetola-le-barrier se sebelisoang ke dip-spin kapa mekhoa ea ho fafatsa le ho phekoloa ka mocheso o tlaase. Ho tloha ha e qaptjoa United States lilemong tsa bo-1970 le tsoelo-pele ea eona e ileng ea latela Japane le Europe, Dacromet e fetohile tharollo e ka sehloohong ea ts'ireletso ea ts'ireletso bakeng sa liboutu tse matla haholo, haholo-holo lihlopheng tsa 8.8 ho ea holimo, moo mokhoa oa setso oa hot-dip galvanizing o nang le likotsi tsa hydrogen embrittlement le mathata a maholo.

2. Dacromet-Coated Hex Bolt ke Eng?

Dacromet-coated hex bolt ke bolt e tloaelehileng ea hexagon (ho ea ka ISO 4014 / ISO 4017 / DIN 931 / DIN 933 kapa ASME B18.2.1) eo bokaholimo ba eona bo sirelelitsoeng ke lesela la zinc-flake le sebelisitsoeng ho tsoa ho seretse se thehiloeng metsing se nang le:

Li-flakes tsa zinc le li-flakes tsa aluminium- thibelo e sebetsang ea ts'ireletso ea kutu (e tloaelehileng karo-karolelano ho 75% Zn / 25% Al ka litaba tse tiileng);
Metsoako ea Chromium kapa li-passivator tse se nang chromium- fana ka matla a ho ipholisa libakeng tse qalang;
Li-binders tsa inorganic le li-cellulose thickeners- tlama li-flakes ka filimi e teteaneng, e khomarelang;
Metsi a deionized- mokhoa oa ho tsamaisa, o etsa hore ts'ebetso e se ke ea e-ba le VOC le tikoloho.

Ho roala ho sebelisoa ka ho qoelisoa (kapa ho fafatsa) ho lateloa ke centrifugal spinning ho tlosa slurry e feteletseng, ebe e phekoloa hoo e ka bang 280-330 ° C metsotso e 20-40. Lipotoloho tse ngata tsa dip-spin (hangata tse peli) li haha botenya ba 6-10 μm; lihlopha tse boima li fihla ho 12-15 μm.

Litšobotsi tsa Bohlokoa tsa Ts'ebetso ea Dacromet

Sebopeho	Tlhaloso
Ho phekola mocheso	280–330°C (ka tlase ho thempereichara ea grade 10.9/12.9 bolts)
Botenya ba ho roala	6–15 μm (e itshetlehile ka sehlopha), e tshesane haholo ho feta dip dip galvanizing (45–85 μm)
Ho tlosoa ha hydrogen	Ha ho na acid e pickling, ha ho electroplating - hoo e batlang e se kotsi ea hydrogen embrittlement
Ho lekana hlooho ea Hex	Koko e tšesaane, e ts'oanang e boloka geometry ea likhoele - liboutu li kopane ka lipompo tse tloaelehileng le linate
Boemo ba tikoloho	E itšetlehileng ka metsi, ha ho na tlhahiso ea VOC; mefuta e sa lefelloeng ea chromium (Cr³⁺/Cr⁶⁺-mahala) e teng
Motlakase conductivity	Filimi e tsamaisang, e loketseng meaho ea motheo-ea bohlokoa

Letlapa la 1. Litšobotsi tsa bohlokoa tsa mokhoa oa ho roala Dacromet.

3. Mokhoa oa Tšireletso ea Corrosion

Dacromet e sireletsa karoloana ea tšepe ka mekhoa e meraro e tlatselletsang:

1.Phello ea thibelo- li-flakes tsa zinki le aluminium tse pota-potiloeng li theha filimi e nang le laminated e nang le tsela e tortuous e liehisang ho kenella ha metsi, oksijene le li-ion tsa chloride haholo.

2.Tshireletso ea sehlabelo- zinki ha e hlomphehe ho feta tšepe; sebakeng sefe kapa sefe, zinki e senya ka mokhoa o ikhethileng 'me ka mokhoa o makatsang e sireletsa tšepe e pepesitsoeng.

3.Pasivation/ Ho iphodisa- li-passivator li etsa lifilimi tsa insoluble oxide libakeng tse senyehileng, "ho folisa" mengoallo e menyenyane le ho liehisa mafome a masoeu le ho thehoa ha mafome a khubelu.

Motsoako oa mekhoa ena e meraro e hlalosa hore na ke hobane'ng ha liphahlo tsa Dacromet li fana ka lihora tse 500-1,000 ho mafome a khubelu litekong tse sa nke lehlakore tsa letsoai (ho ea ka ISO 9227 / ASTM B117) ka botenya ba 6-10 μm feela - makhetlo a 'maloa ts'ebetso ea botenya bo lekanang le electro-galvanizing.

4. Qetello

Liboutu tsa hex tse koahetsoeng ka Dacromet li kopanya matla a mochine a lihlopha tse tloaelehileng tsa thepa ea 8.8-12.9 le mokhoa o mosesaane, o ts'oanang, o sireletsehileng oa haedrojene, le mokhoa o sireletsang tikoloho. Ka ts'ebetso ea ho fafatsa letsoai ka makhetlo a 'maloa ho feta electro-galvanizing ka karoloana ea botenya ba hot-dip galvanizing, Dacromet e se e le mokhoa o ikhethileng oa li-fasteners tse matla haholo mererong e batlang ea meaho, matla le lipalangoang.

Bakeng sa bareki le baenjiniere, lintlha tsa bohlokoa tsa liqeto ke sehlopha sa ho koahela (botenya le lihora tsa NSS), mofuta oa chromate (Cr³⁺ vs Cr-free), taolo ea khohlano, le ho latela ISO 10683 / ASTM F1136. Dacromet hex bolt e boletsoeng hantle e fana ka botšepehi bo sa lebelloang, ba nako e telele - esita le libakeng tse thata ka ho fetisisa.

Ha ke na. E latelang.

Litaba tsa morao-rao