DACROMET BOLTS

2026-11-07

1. Hordhac

Injineernimada casriga ah, kala-goysyada xidhan waa in ay iska caabiyaan culaysyada farsamada iyo daxalka deegaanka labadaba. Galvanizing dhaqameedka elektiroonigga ah iyo galvanization-ku-kululku waxay bixiyaan ilaalin ka-hortagga miridhku laakiin waxay la ildaran yihiin qallafsanaanta hydrogen ee boolal-xoog sarreeya iyo faragelinta cabbirka ee dunta saxda ah. Dahaarka Dacromet, nidaamka flake zinc-aluminium ee la sameeyay 1970-meeyadii, ayaa ka gudubta xaddidaadyadan. Waxay bixisaa iska caabin heer sare ah oo daxalka ah, waxay meesha ka saartaa halista embrittlement hydrogen, waxay ilaalisaa cabbirada dunta, waxayna bixisaa xasillooni heerkul sare ah ilaa 300 ° C. Dacromet bolts ayaa hadda si weyn loogu qeexay baabuurta, dhismaha, tamarta dabaysha, tareennada, iyo warshadaha badda.

2. Waa maxay Dakrometka

Dacromet waa dahaadh aan koronto ahayn, oo biyo ku salaysan oo zinc-flake ah oo ka kooban zinc-dheelitir ah iyo jajab aluminium ah oo ku jira xiraha aan noolaha ahayn. Codsiga iyo daaweynta ka dib, jajabyada is dulsaaran waxay sameeyaan xannibaad cufan oo lakabyo badan leh oo siiya ilaalinta xannibaadaha iyo ilaalinta cathodic allabari substrate-ka birta ah.

Astaamaha muhiimka ah:

Dhumucda filimka: sida caadiga ah 5-12 μm ( aad uga khafiifsan galvanizing-kuleelka)
Muuqashada: dhammays bir-cawlan lebbisan
Ma jirto khatar qallafsan oo hydrogen ah (ma lahan aashitada ama korantada)
Iska caabin daxalka: inta badan>1,000 saacadood milix buufin ilaa miridhku cas (ASTM B117)
Iska caabin heerkul sare ah ilaa 300 °C adeeg joogto ah

Dahaarka waxaa lagu dabaqaa dip-spin (caado loogu talagalay xirmooyinka bulk), buufinta, ama biyo-mareenka, ka dibna kulaylka lagu daaweeyay ~ 300 °C. Koofiyadaha dusha sare ee ikhtiyaariga ah waxay sii kordhiyaan iska caabinta daxalka waxayna xakameynayaan isku-dheellitirka isku-xirnaanta waxqabadka qulqulka-xanuunka joogtada ah.

3. Dulmarka Habka Dahaarka

Habka caadiga ah ee boolalku wuxuu ka kooban yahay afar marxaladood:

1. Diyaarinta dusha sare: Nadiifinta alkaline oo ay ku xigto nadiifinta farsamada haddii loo baahdo. Asiidh-qaadista waa la iska ilaaliyaa si looga hortago nuugista hydrogen.

2.Coating Coating: Qaybaha waxaa lagu rusheeyaa biyo-biyoodka zinc-aluminium flake slurry (dip-spin for boolal yar yar) ama la buufiyo; xad-dhaafka waxaa lagu saarayaa centrifugation si ay u dhumucdiisuna lebbiska.

3.Cudurka: Dubida qiyaastii 300-320 °C waxay beddeshaa xiraha waxayna xoojinaysaa jajabyada birta ah oo ay noqdaan daahan aan dabiici ahayn oo si adag ugu xidhan.

4.Koobka dusha sare ee ikhtiyaarka ah Shaabadeeyaha khafiifka ah wuxuu hagaajiyaa saliidda, caabbinta kiimikada, wuxuuna sii kordhiyaa waxqabadka buufinta milixda.

Sababtoo ah geeddi-socodku waa mid aan elektrolytic ahayn oo ka madax bannaan aashitada soo-qaadista, boolal-xoog sarreeya (Fasalka 8.8, 10.9, 12.9 iyo ASTM A490) waa la dahaadhay iyada oo aan lahayn khatar gudaha ah ee hydrogen-ka-faa'iido badbaado oo muhiim ah oo ku saabsan korantada dhaqameed.

4. Faa'iidooyinka muhiimka ah ee Dacromet Bolts

4.1 Daxalka Sare & Waxqabadka Ka-hortagga miridhku

Filimka Dacromet ee khafiifka ah (6-10 μm) wuxuu si joogto ah u adkeysanayaa 1,000-2,000 saacadood ee baaritaanka buufinta milixda dhexdhexaadka ah ka hor inta uusan miridhku guduudan soo bixin—7-10 jeer ayuu ka fiican yahay korantada-galvanizing-ka caadiga ah. Qaab dhismeedka lakabka badan ayaa bixiya ilaalinta xannibaadda halka jajabyada zinc ay bixiyaan ilaalin cathodic allabari ah. Dareenka Chromate wuxuu kaloo hoos u dhigaa daxalka wuxuuna bixiyaa is-bogsiin xaddidan oo xagtimo yaryar ah.

4.2 Ma jiro Embrittlement Hydrogen

Dhalooyinka xoogga badan waxay aad ugu nugul yihiin qulqulka hydrogen ka soo qaadista aashitada iyo korantada, taas oo keeni karta jab jaban oo daahsan. Dacromet waxay meesha ka saaraysaa khatartan gebi ahaanba. Sidaa darteed waxaa loo door bidaa xirayaasha adag ee culus ee matoorada baabuurta, chassis, birta qaab dhismeedka, iyo shirarka la xiriira badbaadada.

4.3 Saxnaanta cabbirka & Taam ahaanshaha Xadhkaha

Dhumucdiisuna waxay tahay 5-12 μm, Dacromet si weyn uma beddelo joomatari dunta. Nuska caadiga ah waxa la isticmaali karaa iyada oo aan si xad dhaaf ah loo taaban. Taas bedelkeeda, galvanization-ku-kulul (40-80 μm) inta badan waxay u baahan tahay nuts gaar ah. Dahaarkan khafiifka ah ee is waafajinta ayaa ku habboon boolal sax ah iyo xidhidhiyeyaasha fican.

4.4 Iska caabin heerkul-sare ah & jajab la xakameeyey

Dacromet waxay ahaanaysaa mid deggan ilaa 300 °C adeeg joogto ah, oo aad uga sarreeya xadka korantada (~ 120 ° C) ama galvanizing-kulul (~ 200 ° C). Koodhka sare ee ku habboon isku-dhafka is-jiidhka ayaa lagu xakameyn karaa (sida caadiga ah μ = 0.10-0.18), iyadoo la hubinayo culeyska isku dhejinta ee joogtada ah iyo habdhaqan adag oo badan oo la isku halayn karo.

5. Isbarbardhigga Waxqabadka

Jadwalka hoose ayaa soo koobaya faraqa u dhexeeya Dacromet iyo daawaynta caadiga ah ee dusha sare ee boolalka:

Qiyaasta waxqabadka	Dacromet	Electro-Galvanizing	Galvanizing Kulul-Dip
Dhumucda caadiga ah	5-12 μm	5-15 μm	40-80+ μm
Buufis milix ah (ilaa miridh cas)	1,000-2,000+ saac	100-300 saacadood	500-1,000 saacadood
H₂ Khatarta Ebrittlement	Midna	Sare (wuxuu u baahan yahay dubista)	Dhexdhexaad
Heerkulka Joogtada ah ee ugu badan.	≈ 300 °C	≈ 100-120 °C	≈ 200 °C
Faragelinta dunta	Ugu Yar / Midna	Hoose	Muhiimad leh
Bolts-Awooda Sare	Aad u wanaagsan (8.8-12.9)	Xadid / Halis ah	Xaddidan
Muuqashada	Labbiska qalin-cawlan	Zinc dhalaalaya ama buluug ah	Qalafsan, cawlan caajis ah

Shaxda 1: Waxqabadka isbarbardhigga ee daaweynta dusha sare ee boodhka ee caadiga ah

Dacromet waxay bixisaa isku darka fican ee filim khafiif ah, iska caabin daxalka daran, halista embrittlement hydrogen eber, iyo awood heerkul sare — taas oo ka dhigaysa mid ka doorbiday codsiyo badan oo adag.

6. Codsiyada caadiga ah

Daboolka dahaarka leh ayaa si weyn loo isticmaalaa halka ilaalinta daxalka, badbaadada, iyo saxnaanta cabbirku ay muhiim u yihiin:

Gaadiid & Gaadiid: Matoorka, chassis, ka joojinta iyo xirmooyinka jirka (gaar ahaan Fasalka 10.9/12.9).
Tamarta Dabaysha: Tower, nacelle iyo boolal aasaaska xeebaha ama jawiga warshadaha.
Jidka Tareenka & Kaabayaasha: Raad-raac xirayaasha, buundooyinka iyo isku xirka qaabdhismeedka u baahan nolol dheer.
Dhismaha & Qaab-dhismeedka Birta: Boolal dhisme oo xoog-sare leh oo galvanizing aan loo baahnayn.
Badda & Badda: Qaybaha daboolaya buufinta milixdu iyo huurka badan (badanaa leh jaakadaha sare ee kor loo qaaday).
Beeraha & Qalabka Culus: Mashiinnada ka shaqeeya carrada daxalaysa ama meelaha bannaanka ah.

7. Heerarka khuseeya & Tilmaamaha Xulashada

Dacromet iyo dahaarka la midka ah ee zinc-flake waxaa lagu daboolay heerar caalami ah oo ay ku jiraan ISO 10683 ( xirxirayaasha - daahannada zinc flake non-electrolytically codsatay), EN 13858, ASTM F1136/F1136M, iyo hababka buufinta cusbo ASTM B117 / ISO 9227

Marka la qeexayo boolalka Dacromet, injineeradu waa inay tixgeliyaan:

Heerka Xoogga: Ku habboon 8.8 iyo ka sare; inta badan waa qasab 10.9/12.9 qaybaha badbaadada-muhiimka ah.
Heerka Daxalka: Dooro miisaanka dahaarka, tirada jaakadaha iyo jaakadaha dushooda sida waafaqsan buufinta milixda ama waxqabadka tijaabada wareegtada ah.
Iskuxidhka Xun Sheeg jaakad dusheeda oo la kontoroolo haddii culeyska isku dhejinta ee joogtada ahi uu muhiim yahay.
Deegaanka: Aad ugu fiican warshadaha, baabuurta iyo meelo badan oo dibadda ah; qiimee nidaamyada dhumuc weyn ee soo-gaadhista ba'an ee badda.
Qiimaha marka loo eego wareegga nolosha: Qiimaha cutubka ka sarreeya dajinta zinc ee aasaasiga ah waxaa badanaa lagu dhimaa nolosha adeegga iyo dayactirka hoose.

8. Gabagabo

Dacromet bolts waxay u taagan yihiin qaangaadh, xal wax qabad sare leh oo loogu talagalay ilaalinta daxalka ee xirayaasha. Dahaarka khafiifka ah ee zinc-aluminium flake wuxuu keenaa iska caabin milix-buufi ah oo aad uga sarreeya kuwa elektiroonigga ah ee caadiga ah, waxay meesha ka saaraysaa khatarta isku-darka hydrogen-ka ee khatar gelinaysa boolal-xoog-sare, waxay ilaalisaa cabbirrada dunta saxda ah, waxayna u adkaysataa heerkul sarreeya ilaa 300 ° C.

Injineerada iyo iibsadayaasha doonaya waxqabadka lidka ku ah daxalka iyo daxalka ee la isku halayn karo ee baabuurta, qaab dhismeedka, tamarta iyo codsiyada warshadaha, bolts-dahaarka Dacromet waxay bixiyaan dheellitirka la xaqiijiyay ee adkaysiga, badbaadada iyo hufnaanta cabbirka. Marka si sax ah loo qeexo—oo u dhigma darajada dahaarka, koodhka dushiisa iyo guryaha is jiid jiidka ee deegaanka adeega—waxay gacan ka geystaan nolosha qayb ka mid ah, hoos u dhigista dayactirka iyo hagaajinta isku halaynta nidaamka guud. Sida baahida loo qabo xoojinta sare, xirayaasha muddada dheer sii kordhaya ayaa sii kordhaya, dahaarka zinc-flake sida Dacromet ayaa ah tiirarka aasaasiga ah ee injineernimada dusha sare ee xiraha.

Horay Xiga.

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