Kev kho deg rau Fasteners: Phau Ntawv Qhia Kev Qhia

Yuav luag tag nrho cov kev lag luam fasteners yog tsim los ntawm carbon steel, alloy steel, los yog stainless hlau. Txawm hais tias siv cov khoom siv corrosion-resistant, kev kho saum npoo tseem ceeb heev rau kev txhim kho cov kav ntev ntawm bolts thiab txiv ntoo hauv qhov chaw nruj. Tsab ntawv xov xwm no tshawb txog cov txheej txheem sib txawv thiab lawv cov ntawv thov, muab cov engineers thiab cov chaw tsim khoom nrog kev nkag siab zoo rau kev ua haujlwm zoo fastener.

1. Electroplated Zinc (Zinc Plating)

Electroplated zinc yog cov txheej txheem siv dav tshaj plaws rau kev lag luam steel fasteners vim nws cov nqi-zoo thiab kev zoo nkauj versatility (muaj nyob rau hauv dub los yog txiv ntseej drab). Txawm li cas los xij, nws muaj qhov nruab nrab corrosion kuj, feem ntau kav ntev li 72 teev nyob rau hauv nruab nrab ntsev tsuag tshuaj ntsuam. Cov sealants tshwj xeeb tuaj yeem txuas qhov no mus rau 200+ teev, tab sis ntawm 5-8 npaug ntawm tus nqi.

Ib qho kev txwv tseem ceeb yog hydrogen embrittlement, uas ua rau muaj kev pheej hmoo tsis muaj zog bolts (qib 10.9 thiab siab dua). Tom qab plating ci tuaj yeem txo cov hydrogen diffusion, tab sis cov txheej txheem tsis tshua siv vim kev ua haujlwm nyuaj thiab nqi. Tsis tas li ntawd, zinc-plated fasteners muaj qhov sib npaug ntawm qhov sib npaug ntawm qhov sib npaug ntawm qhov sib npaug, ua rau lawv tsis haum rau cov pob qij txha tseem ceeb. Lubricant tom qab kev kho mob tuaj yeem txhim kho qhov sib xws tab sis ntxiv tus nqi.

2. Phosphating

Phosphating muab ib qho txiaj ntsig zoo rau zinc plating, txawm tias muaj kev tiv thaiv corrosion tsis zoo. Kev ua tau zoo yog nyob ntawm qhov zoo ntawm cov roj tom qab kev kho mob: cov roj txheej txheem tawm los ntawm 10-20 teev ntawm cov tshuaj tsw qab ntsev, thaum cov roj premium txuas ntxiv mus rau 72-96 teev ntawm 2-3 zaug tus nqi.

Ob hom dominate industrial siv:

• Zinc Phosphating: Muab lubricity zoo dua rau kev sib dhos yooj yim.

• Manganese Phosphating: Excels nyob rau hauv corrosion kuj, hnav tsis kam, thiab thermal stability (107–204°C / 225–400°F).

Phosphated fasteners yog txaus siab rau lawv cov kev txhim khu kev qha torque-rau-preload zoo sib xws, ua rau lawv zoo tagnrho rau cov rooj sib txoos tseem ceeb xws li cov khoom siv cav (xws li, txuas cov pas nrig, lub tog raj kheej taub hau bolts) thiab cov qauv hlau sib txuas. Qhov tseem ceeb, phosphating zam hydrogen embrittlement, ua rau nws yog qhov kev xaiv rau lub zog siab bolts (qib 10.9+).

3. Dub Oxide

Dub oxide, ua ke nrog roj txheej, yog kev xaiv nyiaj txiag rau kev lag luam fasteners. Thaum pom kev pom zoo thaum oiled, nws qhov kev tiv thaiv corrosion tsawg heev - tsuas yog 3-5 teev nyob rau hauv kev ntsuam xyuas ntsev tsuag ib zaug roj degrades. Torque sib xws tsis zoo, tab sis kev siv roj thaum sib dhos tuaj yeem txo qhov no. Nws qhov kev siv tseem ceeb yog nyob rau hauv cov ntawv tsis tseem ceeb, tus nqi qis.

4. Cadmium Plating

Cadmium plating muab tshwj xeeb corrosion kuj, tshwj xeeb tshaj yog nyob rau hauv marine ib puag ncig. Txawm li cas los xij, nws cov toxicity siab thiab cov nqi kho dej khib nyiab ua rau nws 15-20 npaug kim dua zinc plating. Kev siv yog txwv rau cov haujlwm tshwj xeeb xws li offshore roj rigs thiab naval aviation, qhov kev ua tau zoo rau cov nuj nqis.

5. Chromium plating

Chromium plating muab kev zoo nkauj, tawv, thiab kub tsis kam (txog 650 ° C / 1200 ° F). Txawm li cas los xij, nws txoj kev ua lag luam raug txwv vim yog tus nqi sib npaug nrog cov hlau tsis muaj steel thiab pheej hmoo hydrogen embrittlement tsis tu ncua. Pre-plating tooj liab thiab npib tsib xee txheej yog qhov tseem ceeb rau kev tiv thaiv corrosion.

6.Nyiaj & Nickel Plating

• Nyiaj Plating: Ua raws li cov khoom siv roj nplua nyeem thiab tiv taus qhov kub thiab txias (txog 871 ° C / 1600 ° F), tiv thaiv kev kub nyhiab hauv kev siv cua sov (xws li aerospace fasteners). Cov nqi txwv feem ntau txwv tsis pub siv rau cov txiv ntoo lossis cov bolts me.

• Nickel Plating: Ua ke corrosion kuj nrog hluav taws xob conductivity, zoo tagnrho rau cov khoom xws li roj teeb terminals.

7. Kub-Dip Galvanizing

Kub-dip galvanizing yuav immersing fasteners nyob rau hauv molten zinc, ua ib tug tuab, corrosion-resistant txheej (15-100 μm). Txawm li cas los xij, cov txheej tuab tsis sib xws ua rau cov xov zoo sib xws, xav tau cov xov tooj tom qab galvanizing rov ua haujlwm lossis cov txiv ntseej loj - ob qho tib si uas cuam tshuam lub zog. Cov txheej txheem kuj yog ib puag ncig txaus ntshai vim zinc pov tseg thiab emissions. Qhov tseem ceeb, nws tsis tsim nyog rau qib 10.9+ fasteners vim muaj kev pheej hmoo thermal.

8. DacrometTxheej

Dacromet®, muab kev tiv thaiv zoo ib yam ntawm zinc-aluminium matrix. Lawv tshem tawm hydrogen embrittlement thiab muab cov kev sib tw zoo tshaj plaws, ua rau lawv zoo tagnrho rau kev siv zog siab, siab corrosion.

9.Lwm tus

Cov txheej txheem tshwj xeeb xws li Magni (MAGNI), Ruspert (RUSPERT), thiab Tiodize's aluminium / Teflon hybrids ua rau cov kev xav tau tshwj xeeb, muab kev hnav zoo dua, lubrication, lossis tshuaj lom neeg inertness.

Kev kho deg rau Stainless Hlau Fasteners

• Degreasing: Qhov tseem ceeb rau kev tshem tawm cov roj tsim tawm uas cuam tshuam kev ua haujlwm thiab kev zoo nkauj.

• Passivation: Txhim kho corrosion kuj thiab ci ntsa iab saum npoo los ntawm immersing fasteners hauv nitric lossis citric acid daws.

• Electroplating: Xaiv cov xim nickel lossis zinc coatings txhim kho cov tsos lossis kev ua haujlwm, txawm tias cov hlau tsis muaj corrosion kuj feem ntau ua rau qhov tsis tsim nyog.

Xaus

Xaiv qhov zoo tshaj plaws kev kho mob saum npoo yuav tsum sib npaug corrosion kuj, mechanical kev ua tau zoo, ib puag ncig kev cai, thiab nqi. Los ntawm electroplated zinc rau pob nyiaj sib dhos rau thermal diffusion txheej rau lub hom phiaj tseem ceeb, txhua txoj kev daws teeb meem tshwj xeeb. Cov kws tshaj lij yuav tsum ua qhov tseem ceeb ntawm kev sib raug zoo nrog cov kev ua haujlwm - txawm tias tawm tsam cov dej ntsev, qhov kub thiab txias, lossis cov khoom hnyav - kom ntseeg tau tias muaj kev ntseeg siab thiab siv tau ntev.

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