DACROMET BOLTS

2026-11-07

1. Gabatarwa

A cikin aikin injiniya na zamani, ƙullun haɗin gwiwa dole ne su tsayayya da nauyin injina da lalata muhalli. Na al'ada electro-galvanizing da zafi tsoma galvanizing samar da anti-tsatsa kariya amma fama da hydrogen embrittlement a high-ƙarfi kusoshi da kuma girma tsoma baki a kan madaidaicin zaren. Dacromet shafi, tsarin flake na zinc-aluminum wanda aka haɓaka a cikin 1970s, ya shawo kan waɗannan iyakokin. Yana ba da juriya na lalata, yana kawar da haɗarin haɓakar hydrogen, yana adana girman zaren, kuma yana ba da kwanciyar hankali mai zafi har zuwa 300 ° C. Dacromet bolts yanzu an bayyana su sosai a cikin motoci, gini, makamashin iska, layin dogo, da masana'antar ruwa.

2. Menene Dacromet Coating?

Dacromet wani abin da ba na lantarki ba ne, rufin tuti-flake na ruwa na tushen ruwa wanda ya ƙunshi ƙananan sikelin zinc da flakes na aluminum a cikin ɗaurin inorganic. Bayan aikace-aikace da kuma waraka, da overlapping flakes samar da wani m Multi-Layer shãmaki cewa samar da duka biyu shãmaki kariya da hadaya cathodic kariya ga karfe substrate.

Mahimman halaye:

Kaurin fim: yawanci 5-12 μm (ya fi bakin ciki fiye da galvanizing mai zafi)
Bayyanar: uniform azurfa-launin toka karfe gama
Babu haɗarin haɓakar hydrogen (babu acid pickling ko electrolysis)
Juriya na lalata: sau da yawa> 1,000 sa'o'i 1,000 gishiri fesa zuwa ja tsatsa (ASTM B117)
Babban zafin jiki har zuwa 300 °C ci gaba da sabis

Ana amfani da suturar ta hanyar dip-spin (na kowa don masu ɗaure mai yawa), fesa, ko tsoma-magudanar ruwa, sannan a warke da zafi a ~ 300 ° C. Manyan riguna na zaɓi na ƙara haɓaka juriya na lalata da sarrafa juzu'i na juzu'i don daidaitaccen ƙarfin juzu'i.

3. Bayanin Tsarin Rufe

Tsarin al'ada don kusoshi ya ƙunshi manyan matakai guda huɗu:

1.Tsarin Sama: Ragewar alkaline ya biyo bayan tsabtace injin in an buƙata. Ana guje wa tsinken acid don hana sha hydrogen.

2. Shafi Application: An tsoma sassan a cikin ruwa mai ruwa na zinc-aluminum flake slurry (dip-spin for small bolts) ko fesa; wuce haddi an cire ta centrifugation ga uniform kauri.

3.Cikin: Yin burodi a kusan 300-320 ° C yana jujjuya abin ɗaure kuma yana ƙarfafa flakes ɗin ƙarfe zuwa murfin inorganic.

4.Zaɓi Topcoat / Seler: Sirri na bakin ciki yana inganta mai, juriyar sinadarai, kuma yana ƙara haɓaka aikin fesa gishiri.

Saboda tsarin ba shi da electrolytic kuma ba shi da tsinkewar acid, ƙarfin ƙarfi mai ƙarfi (Grade 8.8, 10.9, 12.9 da ASTM A490) ana iya shafa shi ba tare da haɗarin haɓakar hydrogen na ciki ba — fa'idar aminci mai mahimmanci akan lantarki na gargajiya.

4. Mahimman Amfanin Dacromet Bolts

4.1 Babban Lalata & Ayyukan Anti-tsatsa

Fim ɗin Dacromet na bakin ciki (6-10 μm) akai-akai yana jure wa sa'o'i 1,000-2,000 na gwajin feshin gishiri mai tsaka-tsaki kafin tsatsawar ja ta bayyana-sau 7-10 mafi kyau fiye da na al'ada electro-galvanizing. Tsarin flake mai nau'i-nau'i da yawa yana ba da kariya ga shinge yayin da flakes na zinc suna ba da kariya ta katodic hadaya. Passivation na chromate yana ƙara jinkirin lalata kuma yana ba da iyakacin warkar da kai a ƙananan raunuka.

4.2 Babu Ruwan Ruwa

Ƙarfin ƙarfi mai ƙarfi yana da sauƙin kamuwa da haɓakar hydrogen daga tsintsawar acid da electroplating, wanda zai iya haifar da jinkirin karaya. Dacromet yana kawar da wannan haɗari gaba ɗaya. Don haka an fi so don maɗaukaki masu tsayi masu tsayi a cikin injunan motoci, chassis, ƙarfe na tsari, da kuma taruka masu alaƙa da aminci.

4.3 Daidaiton Girman Girma & Fit Fit

Tare da kauri mai kauri na 5-12 μm kawai, Dacromet ba ya musanya mahimmin lissafi na zaren. Ana iya amfani da daidaitattun kwayoyi ba tare da wuce gona da iri ba. Sabanin haka, galvanizing mai zafi mai zafi (40-80 μm) sau da yawa yana buƙatar kwayoyi na musamman. Wannan bakin bakin ciki mai kwarjini yana da kyau don madaidaicin kusoshi da masu ɗaure mai kyau.

4.4 Tsayayyar Tsawon Zazzabi & Sarrafa Sarrafa

Dacromet ya kasance barga har zuwa 300 ° C ci gaba da sabis, nesa da iyakokin lantarki (~ 120 ° C) ko galvanizing mai zafi (~ 200 ° C). Tare da manyan riguna masu dacewa, ana iya sarrafa madaidaicin juzu'i (yawanci μ = 0.10-0.18), tabbatar da daidaiton nauyin matsewa da ingantaccen ɗabi'a mai ƙarfi da yawa.

5. Kwatancen Ayyuka

Teburin da ke ƙasa yana taƙaita mahimman bambance-bambance tsakanin Dacromet da jiyya na al'ada na yau da kullun don kusoshi:

Ma'aunin Aiki	Dacromet	Electro-Galvanizing	Hot-Dip Galvanizing
Yawan Kauri	5-12 m	5-15 m	40-80+ μm
Salt Spray (zuwa tsatsa ja)	1,000-2,000+ h	100-300 h	500-1,000 h
H₂ Haɗarin Haɗawa	Babu	Babban (yana buƙatar yin burodi)	Matsakaici
Max Ci gaba da Temp.	≈ 300 ° C	≈ 100-120 ° C	≈ 200 ° C
Tsangwamar Zare	Kadan / Babu	Ƙananan	Mahimmanci
Ƙarfin Ƙarfi	Mafi kyau (8.8-12.9)	Limited / Haɗari	Iyakance
Bayyanar	Uniform azurfa-launin toka	Zinc mai haske ko shuɗi	M, m launin toka

Tebura 1: Kwatankwacin aikin jiyya na gaba ɗaya

Dacromet yana ba da haɗe-haɗe na fim na bakin ciki, matsananciyar juriya, haɗarin haɓakar hydrogen, da ƙarfin zafin jiki - yana mai da shi fifiko don aikace-aikacen faɗuwar buƙatun da yawa.

6. Aikace-aikace na yau da kullun

Ana amfani da kusoshi mai rufaffiyar dacromet sosai inda kariya ta lalata, aminci, da daidaiton girma ke da mahimmanci:

Motoci & Sufuri: Injin, chassis, dakatarwa da kayan aikin jiki (musamman Grade 10.9/12.9).
Ƙarfin Iska & Ƙarfi: Hasumiya, nacelle da harsashi a cikin yanayin bakin teku ko masana'antu.
Hanyar Railway & Kayan Aiki: Bi-bi-bi-bi-gama, gadoji da haɗin ginin da ke buƙatar tsawon rayuwar sabis.
Tsarin Gina & Ƙarfe: Tsari mai ƙarfi mai ƙarfi inda galvanizing ba a so.
Marine & Offshore: Abubuwan da aka fallasa su ga feshin gishiri da zafi mai yawa (sau da yawa tare da ingantattun riguna).
Kayan Aikin Noma & Nauyi: Injin da ke aiki a cikin ƙasa mai lalata ko waje.

7. Ma'auni masu dacewa & Jagorar Zaɓi

TS EN 13858, ASTM F1136 / F1136M, ASTM F1136 / F1136M, da hanyoyin fesa gishiri ASTM B117 / ISO 9227. TS ISO 10683 (Masu ɗaure - Abubuwan da ba a amfani da su ta hanyar lantarki)

Lokacin zayyana bolts na Dacromet, injiniyoyi yakamata suyi la'akari:

Matsayin Ƙarfi: Mafi kyau ga 8.8 kuma mafi girma; sau da yawa wajibi ga 10.9/12.9 aminci-m sassa.
Lalacewar Class: Zaɓi nauyin sutura, adadin riguna da rigar sama bisa ga buƙatar fesa gishiri ko aikin gwajin cyclic.
Ƙimar Ƙarfafawa: Ƙayyade riga-kafi mai sarrafa mai-mai sarrafawa idan daidaitaccen nauyin matsi yana da mahimmanci.
Muhalli: Mafi kyau ga masana'antu, motoci da kuma wurare masu yawa na waje; kimanta tsarin kauri don matsananciyar fallasa ruwa.
Farashin vs. Zagayowar Rayuwa: Maɗaukakin naúrar fiye da na asali na tutiya sau da yawa ana biya ta ta tsawon rayuwar sabis da ƙarancin kulawa.

8. Kammalawa

Dacromet bolts suna wakiltar balagagge, ingantaccen bayani don kariyar lalata na manne. Sirri na bakin ciki na zinc-aluminum flake shafi yana ba da juriya na fesa gishiri mai nisa fiye da na al'ada electro-galvanizing, yana kawar da haɗarin haɓakar hydrogen wanda ke yin barazanar ƙugiya mai ƙarfi, yana adana madaidaicin girman zaren, kuma yana jure yanayin zafi har zuwa 300 ° C.

Ga injiniyoyi da masu siye da ke neman abin dogaron rigakafin tsatsa da aikin lalatawa a cikin kera motoci, tsarin gini, makamashi da aikace-aikacen masana'antu, ƙwanƙwasa mai rufin Dacromet yana ba da tabbataccen ma'auni na dorewa, aminci da amincin girma. Lokacin da aka ƙayyade daidai-madaidaicin darajar shafi, topcoat da kaddarorin gogayya zuwa yanayin sabis-suna ba da gudummawa ga rayuwa mai tsayi, rage kulawa da ingantaccen amincin tsarin gabaɗaya. Kamar yadda buƙatun samun ƙarfi mai ƙarfi, masu ɗaure masu dorewa suna ci gaba da haɓakawa, suturar flake-zinc irin su Dacromet sun kasance ginshiƙan injiniyan kayan ɗaki na zamani.

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