Dacromet-Rufaffen Bolts da Kwayoyi

2026-10-28

1. Gabatarwa

Haɗin zaren yana da ƙarfi kawai kamar mafi raunin bangarensa. Ƙirar hex mai rufin Dacromet mai ƙima wacce aka murɗa cikin ƙwaya mai arha mai arha ba tsarin kariyar lalata ba ce - galvanic cell jiran kasawa. Kwayar da aka ɗora da zinc ta zama anode a cikin ma'auratan, yana lalata da kyau, yana kama da zaren kulle, kuma gabaɗayan haɗin gwiwa ya rasa nauyin matse shi tun kafin kullin da kansa ya nuna jajayen tsatsa.

A saboda wannan dalili, ƙwararrun ƙwararrun ƙwararrun ƙwararru koyaushe suna bi da su kusoshi, goro da wanki kamar fakitin kariya guda ɗaya da ya dace da lalata. Dacromet (zinc-aluminum flake, non-electrolytic) shafi shine tsarin zaɓi na wannan kunshin: yana ba kowane zaren - namiji da mace - wani bakin ciki (5-12 μm), uniform, fim din ba tare da hydrogen ba wanda ke jure wa 500-1,000 hours na tsaka-tsakin gishiri mai tsaka-tsaki (NSS) ba tare da fararen tsatsa ba ko ja.

Wannan labarin yana bayanin iyalai masu haɗawa da abin da ke ciki, hanyoyin lalata da ke kai hari ga haɗin gwiwa, dalilin da yasa Dacromet ya dace da kusoshi da goro iri ɗaya, da yadda ake ƙididdigewa da haɗa saitin wanki-nut-nut mai dacewa.

2. Yadda Lalacewa Ke Hari Kan Haɗin Zare

Zaren su ne mafi girman juzu'i-masu lahani na lissafi akan kowane taro na fastener:

1.Crevice lalata- ratar microscopic tsakanin ƙwanƙarar zaren ƙwanƙwasa da ƙwanƙwasa zaren goro yana kama danshi da electrolyte, yana haifar da raɗaɗin yunwar oxygen inda wuraren anodic ke samarwa rami farawa;

2.Galvanic lalata- daban-daban coatings ko karafa (a Dacromet kusoshi tare da electro-plated goro, da bakin ciki a cikin wani galvanized goro) fitar da fifiko ga lalata na kasa daraja bangaren;

3.Lalacewar sutura a taro- zaren scraping da gall a lokacin tightening; bakin ciki electroplate da Organic fenti ana sauƙin yanke ta hanyar, fallasa danda karfe a cikin zaren tushen;

4.Stress maida hankali- zaren mai ɗaukar nauyi na farko yana ɗaukar rabon da bai dace ba na preload, don haka ramukan lalata a can suna saurin fashe gajiya;

5.Fretting karkashin vibration- ƙananan motsi tsakanin masu ɗaukar fuska yana lalata fim ɗin, yana gayyatar farin tsatsa sannan kuma jan tsatsa.

Da zarar kayayyakin tsatsa sun taru a cikin zaren, goro ya kama, karfin tarwatsewa ya zarce karfin shigarwa, kuma kullun ko ingarma sau da yawa dole ne a yanke shi - gazawar "daskararre goro" na al'ada a kula da filin.

3. Juriya na Lalata na Saitin Daidaita

Tsarin sutura (bolt + goro + mai wanki)	Kauri	NSS zuwa jan tsatsa	Zaren dacewa bayan rufewa	Haɗin hydrogen	Farashin dangi
Lalacewar/ kalar kai, mai	—	<24 h	Madalla	Babu	Mafi ƙasƙanci
Zinc farantin + blue chromate	5m ku	≈ 48 h	Yayi kyau	Babban	Ƙananan
Zinc farantin + mai kauri tri-passivate	8-12 m	120-240 h	Yayi kyau	Babban	Ƙananan matsakaici
Injiniya galvanizing	20-50 m	300-800 h	Yayi kyau	Ƙananan sosai	Matsakaici
Hot- tsoma galvanizing (sake nannade goro)	45-85 m	500-1,500 h	Ana buƙatar sake dannawa	Ƙananan	Matsakaici
Dacromet Class 2 (flZn 8)	8m ku	≈ 720 h	Madalla	Babu	Matsakaici
Dacromet Class 3 / baki	10-12 m	≈ 1,000 h	Madalla	Babu	Matsakaici-high

Tebur 1. Tsarin sutura don gunkin goro idan aka kwatanta da (ma'auni na masana'antu).

Saboda ana amfani da rufin don gamawa, sassan da aka sarrafa zafi kuma an warke su a ƙasa da zafin jiki, duka kusoshi da kwayoyi suna kiyaye cikakkun kaddarorin injin su - ƙarfin ƙarfi, ƙarfin hujja da taurin ISO 898-1 / ISO 898-2 - ba canzawa.

4. Mafi kyawun Ayyuka na Majalisar

1.Kada Mix tsarin shafi- biyu Dacromet kusoshi kawai tare da Dacromet kwayoyi da washers; gauraye ma'aurata suna fitar da lalata galvanic na mafi rauni (yawanci-plated zinc);

2.Mutunta tebur mai ƙarfi- nau'i-nau'i na Dacromet mai lubricated suna da ƙasa, mafi kwanciyar hankali na goro fiye da ƙaramin ƙarfe; sake amfani da tsofaffin ma'auni mai ƙarfi yana da ƙarfi kuma yana iya tube zaren goro;

3.Kada a sake mai- hadedde topcoat riga saita gogayya coefficient; ƙarin mai akan zaren yana canza K ba tare da tabbas ba;

4. Tunanin tsarin jam-goro- lokacin da ƙwaya mai bakin ciki da cikakken goro aka tara (tsarin kullewa na gargajiya), ƙara cika na goro akan bakin goro;

5.Watch for gallinga kan nau'i-nau'i na bakin - Dacromet's lubricant topcoat shima yana rage haɗarin galling akan sandunan bakin;

6.Tabbatar da tashin hankali na farko-labarina kan skid na gwaji, ta yin amfani da ainihin haɗin ƙusa-nut-washer daga yawan samarwa.

5. Kammalawa

Rashin lalacewa da wuya yana farawa a kan shank na amosanin gabbai - yana farawa a cikin zaren, a cikin raƙuman ruwa tsakanin kusoshi da goro. Haɗin gwiwa mai dorewa don haka yana buƙatar a madaidaicin fakitin kariya na lalata: Dacromet-rubutun kusoshi, kwayoyi da washers a cikin wannan zinc-flake tsarin, ƙayyadaddun tare (ISO 10683 / ASTM F1136, flZn 8/10, ≥ 720 h NSS), harhada tare da daidai karfin juyi da gogayya dabi'u. Sakamakon shine haɗin zaren da ke tsayayya da tsatsa mai launin ja, tsatsa ja, ramuka, hare-hare da kamawa - ta hanyar shekarun gishiri, yanayi da girgiza.

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