GEOMET® (Jumete) Yakaputirwa Hexagonal Bolts-Technical Nhanganyaya 

1. Nhanganyaya yeGEOMET® (久美特) Coating

GEOMET® (inowanzo zivikanwa muchiChinese se 久美特 kana Jumete) ndeye chromium-isina, mvura-yakavakirwa zinc-aluminum flake coating yakagadziriswa neNOF Metal Coatings Group semutsivi ane hushamwari kwezvakatipoteredza kune yechinyakare DACROMET® maitiro. Inopa kuchengetedzwa kwakatanhamara kwekudzivirirwa kwesimbi, kunyanya mabhaudhi ane hexagonal, uku ichitevedzera zvizere mirau yemazuva ano yezvakatipoteredza yakadai seRoHS, REACH, ELV (2000/53/EC), uye ISO 10683.

Iyo yekupfeka ine passivated zinc uye aluminium flakes inosungwa neinorganic matrix. Inoshandiswa nedip-spin kana nzira dzekupfapfaidza uye inorapwa patembiricha yakadzikira, GEOMET® inogadzira simbi yakatetepa sirivheri-grey firimu (kazhinji 6–12 μm) isingakanganise zvakanyanya shinda kana kukwana. Nemhaka yokuti nzira yacho isiri-electrolytic, inobvisa zvachose njodzi yehydrogen embrittlement-yakakosha mukana wepamusoro-simba mabhoti (property classes 8.8, 10.9 uye 12.9).

1.1 Yakakosha Yakanakira yeGEOMET®

• Yakazara chromium-isina (hapana Cr⁶ kana Cr³⁺) uye-yakavakirwa mvura - kugadzirwa kwezvakatipoteredza.
• Yakanakisa munyu-spray kuramba: 720-1500+ maawa (ISO 9227 / ASTM B117) zvichienderana negiredhi uye ukobvu.
• Hapana hydrogen embrittlement - yakanakira yakakwira-tensile fasteners.
• Firimu yakaonda (≈ 8 μm avhareji) - haikanganise bhoti-nzungu musangano kana torque kukosha.
• Kugadzikana kwakanaka kwekushisa kusvika ku300 ° C uye kuramba kumvura yemotokari, zvinonyungudutsa uye cyclic corrosion.
• Magetsi conductivity uye bimetallic kuenderana nealuminium.
• Yakatenderwa nemaOEM makuru: Toyota, Honda, VW, BMW, GM, Ford, Daimler, Fiat, nezvimwe.

1.2 Main GEOMET® Magiredhi

Tafura 1 - Kuenzaniswa kweCommon GEOMET® Coating Systems

Cherechedza: Kuita chaiko kunoenderana nehuremu hwekupotera (kazhinji > 24 g/m²), kugadzirira substrate, uye sarudzo PLUS® topcoats iyo inowedzera kugadzirisa friction coefficient (μ ≈ 0.06–0.20 pa ISO 16047).

2. Hexagonal Bolts - Dhizaini uye Maitiro

Hexagonal (hex) mabhaudhi emusoro ari pakati peanonyanya kushandiswa ma mechanical fasteners. Musoro wavo une mativi matanhatu unobvumira kuomesa nyore neyakajairwa wrenches kana sockets uye inopa yakakura kubereka nzvimbo. Kana yakasanganiswa neGEOMET® coating, aya mabhaudhi anoburitsa ese akakwira mekiniki simba uye epamusoro-refu-refu-kuora kuramba.

2.1 Yakakodzera International Standards

• ISO 4014 / DIN 931 - Hexagon musoro mabhaudhi ane chidimbu shinda (shank pasi pemusoro).
• ISO 4017 / DIN 933 - Hexagon head screws yakazara shinda.
• TS EN ISO 898-1 Mechanical zvimiro zvezvitsigiro zvakagadzirwa nekabhoni simbi uye alloy simbi (zvivakwa makirasi 4.6 kusvika 12.9).
• TS EN ISO 10683 Asina-electrolytically akaiswa zinc flake coatings pazvisungo (zvakanangana neGEOMET®).
• ASTM F1136 / F1136M - Zinc / Aluminium Corrosion Protective Coatings yeFasteners.

2.2 Mechanical Property Classes (ISO 898-1)

Tafura 2 - Common Property Makirasi eSimbi Hex Bolts

GEOMET® coating inonyanya kukosha kumakirasi 10.9 uye 12.9 nekuti iyo isiri-electrolytic process inodzivirira hydrogen embrittlement inogona kuitika neyakajairwa electro-galvanizing.

2.3 Typical Dimensional Ranges

Metric hexagonal mabhaudhi anowanzo kupihwa mumadhayamita kubva kuM5 kusvika kuM36 (uye yakakura pakukumbira). Thread pitch inotevera ISO metric coarse series. Partial-thread bolts (ISO 4014) inosiya shank isina kuverengwa inovandudza simba rekugera; full-thread bolts (ISO 4017) inowedzera kubatanidzwa mumakomba akabatwa.

3. Performance Data & Coating Characteristics

3.1 Corrosion Resistance Data

Tafura 3 - Yakajairika Neutral Salt Spray (NSS) Kuita (ISO 9227 / ASTM B117)

Cyclic corrosion tests (semuenzaniso, GMW 14872, SAE J2334, ACT) inoratidzawo migumisiro yakanaka-kazhinji 60 cycles kana kupfuura pasina tsvuku tsvuku kana yashandiswa zvakanaka.

3.2 Zvimwe Zvishandiso Zvekushanda

1. Kupikisa kwekushisa: Kuita kunochengetwa mushure me100 h pa 180 ° C; inogona kushandiswa kusvika ≈ 300 °C kwenguva pfupi.
2. Chemical resistance: Kuramba kwakanaka kumafuta, mafuta, brake fluid, zvinotonhorera uye akawanda organic solvents (VDA 621-412).
3. Mechanical durability: Yakanakisa kuramba kubata kukuvadzwa uye kuwanda kuomesa matenderedzwa kana akaiswa lubricated topcoats anoshandiswa.
4. Paintability: Inoenderana neakawanda organic coatings uye poda pendi.

3.3 Kuenzanisa neAlternative Coatings

Tafura 4 - GEOMET® vs. Zvimwe Zvakajairwa Fastener Coatings

4. Zvikumbiro uye Kusarudza Mirayiridzo

GEOMET®-yakavharwa hexagonal mabhaudhi inotsanangurwa zvakanyanya mumaindasitiri umo kuchengetedzwa kwenguva refu kwecorrosion, kutevedzera kwezvakatipoteredza uye yakavimbika mechanic performance inodiwa panguva imwe chete.

4.1 Mamiriro Ekushandisa Akajairika

• Motokari: chassis, kumiswa, powertrain, zvisungo zvepasi-muviri (zvakatenderwa neVW, BMW, GM, Toyota, Honda, nezvimwewo).
• Kuvaka & zvivakwa: zvivakwa zvesimbi, mabhiriji, njanji, mhepo-turbine shongwe.
• Michina yekurima neyekuvaka.
• Magetsi nemagetsi akavharirwa uko conductivity uye corrosion resistance zviri kudiwa zvese.
• General maindasitiri midziyo yakafumurwa humidity, munyu kana cyclic tembiricha.

4.2 Sarudzo Mazano

Kana uchitsanangura GEOMET® hexagonal mabhaudhi, funga zvinotevera:

1. Inodiwa corrosion class → sarudza GEOMET 321 (yakajairwa), 500 (inodzorwa-inodzorwa) kana 720 (yakanyanya kudzivirira).
2. Mechanical simba → sarudza kirasi yezvivakwa 8.8, 10.9 kana 12.9 zvinoenderana nemutoro uye kuchengetedza zvinhu.
3. Thread type → partial thread (ISO 4014) yemajoini anogera-akakosha; shinda yakazara (ISO 4017) yekudyidzana kwakanyanya.
4. Friction coefficient → tsanangura PLUS® topcoat kana inodzorwa torque-tension hukama hwakakosha.
5. Zvemamiriro ekunze & zvekutonga zvinodiwa → GEOMET® inogutsa RoHS, REACH uye ELV pasina kumwe kusunungurwa.

4.3 Manotsi Ekusimbisa Hunhu

Vane mukurumbira coating applicators vanochengeta process certification (ISO 9001) uye vanowanzobata maOEM mvumo (Toyota, GM, nezvimwewo). Coating ukobvu, adhesion (tepi bvunzo), munyu-spray kuita uye friction coefficient inofanirwa kusimbiswa zvinoenderana neISO 10683 uye kudhirowa kwevatengi. Chitarisiko chekuona iyunifomu yesimbi sirivha-grey; mavara matema (GEOBLACK®) anowanikwawo kana aesthetics kana chitupa chichida.

5. Mhedziso

GEOMET® (久美特) yakavharwa mabhaudhi ane hexagonal inosanganisa yakavimbika mechanicha kuvimbika kweISO-yakajairwa hex-musoro zvisungo neazvino, chromium-isina zinc-aluminium flake coating iyo inopa yakasarudzika corrosion dziviriro, kutevedzera kwezvakatipoteredza uye rusununguko kubva kune hydrogen embrittlement. Ingave ichishandiswa mumotokari chassis, simbi yekugadzira kana muchina weindasitiri, izvi zvinosungirira zvinopa tekinoroji yepamusoro uye yeramangwana-humbowo mhinduro kune inoda maapplication.

Kuti uwane kurudziro yakanangana neprojekiti, kurongedzerwa kana dhata rezvivakwa, bvunza akakodzera ISO zviyero (4014, 4017, 898-1, 10683) uye tekinoroji data mapepa akapihwa neNOF Metal Coatings Group kana vane mvumo vanyoreri.