- English
- Chinese
- French
- German
- Portuguese
- Spanish
- Russian
- Japanese
- Korean
- Arabic
- Irish
- Greek
- Turkish
- Italian
- Danish
- Romanian
- Indonesian
- Czech
- Afrikaans
- Swedish
- Polish
- Basque
- Catalan
- Esperanto
- Hindi
- Lao
- Albanian
- Amharic
- Armenian
- Azerbaijani
- Belarusian
- Bengali
- Bosnian
- Bulgarian
- Cebuano
- Chichewa
- Corsican
- Croatian
- Dutch
- Estonian
- Filipino
- Finnish
- Frisian
- Galician
- Georgian
- Gujarati
- Haitian
- Hausa
- Hawaiian
- Hebrew
- Hmong
- Hungarian
- Icelandic
- Igbo
- Javanese
- Kannada
- Kazakh
- Khmer
- Kurdish
- Kyrgyz
- Latin
- Latvian
- Lithuanian
- Luxembou..
- Macedonian
- Malagasy
- Malay
- Malayalam
- Maltese
- Maori
- Marathi
- Mongolian
- Burmese
- Nepali
- Norwegian
- Pashto
- Persian
- Punjabi
- Serbian
- Sesotho
- Sinhala
- Slovak
- Slovenian
- Somali
- Samoan
- Scots Gaelic
- Shona
- Sindhi
- Sundanese
- Swahili
- Tajik
- Tamil
- Telugu
- Thai
- Ukrainian
- Urdu
- Uzbek
- Vietnamese
- Welsh
- Xhosa
- Yiddish
- Zulu
- Kinyarwanda
- Tatar
- Oriya
- Turkmen
- Uyghur
Dacromet-Ti a bo Hex Bolts
2026-10-27
1. Ifihan
Awọn boluti hex (awọn boluti ori hexagon) jẹ ọkan ninu awọn ohun mimu ti a lo pupọ julọ ni ikole, ẹrọ, apejọ adaṣe, ati awọn amayederun. Ni awọn agbegbe ibajẹ - awọn ẹya eti okun, awọn ohun ọgbin kemikali, awọn ọna opopona, awọn afara, ati awọn ile-iṣọ irin ita gbangba - igbesi aye iṣẹ ti isẹpo ti a fipa ni igbagbogbo pinnu kii ṣe nipasẹ agbara ti irin, ṣugbọn nipasẹ agbara ti ideri aabo rẹ.
Dacromet ti a bo (ti a tun mọ ni DACROMET, Dacromet zinc-flake coating, tabi zinc-aluminum flake coating) jẹ iyipada ti o da lori omi-ati-idena ti a lo nipasẹ dip-spin tabi awọn ilana fun sokiri ati imularada ni iwọn otutu kekere. Niwọn igba ti kiikan rẹ ni Amẹrika ni awọn ọdun 1970 ati iṣelọpọ ti o tẹle ni Japan ati Yuroopu, Dacromet ti di ojuutu aabo ipata akọkọ fun awọn boluti agbara-giga, ni pataki ni awọn ipele 8.8 ati loke, nibiti galvanizing gbona-dip ibile ti gbe awọn eewu isunmọ hydrogen ati awọn iṣoro iwọn.
2. Kini Hex Bolt ti a bo Dacromet?
Boluti hex ti a bo Dacromet jẹ boluti ori hexagon boṣewa (fun ISO 4014 / ISO 4017 / DIN 931 / DIN 933 tabi ASME B18.2.1) eyiti dada rẹ ti ni aabo nipasẹ ibora orisun zinc-flake ti a lo lati inu slurry orisun omi ti o ni:
- Sinkii flakes ati aluminiomu flakes- idena ipata-idaabobo ti nṣiṣe lọwọ (ipin deede ni ayika 75% Zn / 25% Al nipasẹ akoonu to lagbara);
- Awọn agbo ogun Chromium tabi awọn pasifati ti ko ni chromium- pese passivation ara-iwosan ni awọn agbegbe ibere;
- Inorganic binders ati cellulose thickeners- di awọn flakes sinu ipon, fiimu ti o tẹle;
- Omi ti a fi omi ṣan- awọn rù alabọde, ṣiṣe awọn ilana VOC-free ati ayika ore.
A lo bora naa nipasẹ fibọ (tabi sokiri) atẹle nipa yiyi centrifugal lati yọkuro slurry pupọ, lẹhinna mu ni arowoto ni isunmọ 280–330°C fun awọn iṣẹju 20–40. Awọn iyipo dip-spin pupọ (ni deede meji) kọ sisanra ti a bo ti 6-10 μm; awọn kilasi wuwo de ọdọ 12-15 μm.
Awọn abuda bọtini ti Ilana Dacromet
| Ẹya ara ẹrọ | Apejuwe |
| Itọju otutu | 280–330°C (labẹ iwọn otutu otutu ti ite 10.9/12.9 boluti) |
| Aso sisanra | 6–15 μm (ti o gbẹkẹle kilasi), tinrin ju galvanizing fibọ gbigbona (45–85 μm) |
| Hydrogen embrittlement | Ko si acid pickling, ko si electroplating - fere ko si hydrogen embrittlement ewu |
| Hex ori fit | Tinrin, aṣọ ibora ṣe itọju o tẹle geometry - awọn boluti mate pẹlu awọn taps boṣewa ati eso |
| Profaili ayika | Omi-orisun, ko si VOC itujade; ti ko ni chromium (Cr³⁺/Cr⁶⁺-ọfẹ) awọn iyatọ wa |
| Itanna elekitiriki | Fiimu adaṣe, o dara fun awọn ipilẹ-pataki awọn ẹya |
Table 1. Awọn abuda bọtini ti ilana idabobo Dacromet.
3. Ipata Idaabobo Mechanism
Dacromet ṣe aabo sobusitireti irin nipasẹ awọn ẹrọ ibaramu mẹta:
1.Barrier ipa- Ziniki agbekọja ati awọn flakes aluminiomu ṣe fiimu ti a ti lami pẹlu ọna tortuous kan ti o fa fifalẹ iyanwọle omi, atẹgun, ati awọn ions kiloraidi.
2.Ẹbọ Idaabobo- sinkii jẹ kere ọlọla ju irin; ni eyikeyi ibere tabi ge eti, sinkii corrodes preferentially ati cathodically aabo fun awọn fara, irin.
3.Passivation / ara-iwosan- passivators dagba insoluble ohun elo afẹfẹ fiimu ni bajẹ to muna, "iwosan" kekere scratches ati idaduro funfun ipata ati pupa Ibiyi ipata.
Apapo ti awọn ọna ṣiṣe mẹta wọnyi ṣalaye idi ti awọn aṣọ idalẹnu Dacromet ṣe jiṣẹ nigbagbogbo awọn wakati 500-1,000 si ipata pupa ni idanwo sokiri iyọ didoju (fun ISO 9227 / ASTM B117) ni awọn sisanra ti 6 – 10 μm nikan - ni ọpọlọpọ igba iṣẹ ṣiṣe deede-sisanra elekitiro-galvanizing.
4. Ipari
Awọn boluti hex ti a bo Dacromet darapọ agbara ẹrọ ti awọn kilasi ohun-ini boṣewa 8.8-12.9 pẹlu tinrin, aṣọ-aṣọ, hydrogen-ailewu, ati eto aabo-ibajẹ ọrẹ ayika. Pẹlu iṣẹ sokiri iyọ ni ọpọlọpọ igba ti o dara julọ ju elekitiro-galvanizing ni ida kan ti sisanra ti galvanizing gbigbona, Dacromet ti di sipesifikesonu aiyipada fun awọn ohun mimu agbara-giga ni ibeere awọn amayederun, agbara, ati awọn iṣẹ gbigbe.
Fun awọn olura ati awọn ẹlẹrọ, awọn ifosiwewe ipinnu bọtini jẹ kilasi ti a bo (sisanra ati awọn wakati NSS), iru chromate (Cr³⁺ vs Cr-ọfẹ), iṣakoso onisọpọ ija, ati ibamu pẹlu ISO 10683 / ASTM F1136. Boluti hex Dacromet ti o ni pato ti o ṣe alaye asọtẹlẹ, iduroṣinṣin apapọ igba pipẹ - paapaa ni awọn agbegbe ti o buruju.
