I-Dacromet Hexagonal Bolts-Isingeniso Esiphelele Sezixhumi Eziqinile Ezimelana Nokugqwala 

2. Iyini I-Dacromet Coating?

I-Dacromet iwuhlelo lokuhlanganisa lwe-inorganic olwakhiwe ngama-flakes e-zinc ultra-fine, i-aluminium powder, kanye nesibopho esisekelwe ku-chromium (noma esingenayo i-chromium). Isetshenziswa njengokusabalalisa okusekelwe emanzini futhi yelashwa cishe ku-300 ° C, yenza isibopho se-amorphous esihlanganisa ama-flakes ensimbi agqagqene abe yifilimu evikelayo ehlangene. Ugqinsi olujwayelekile lokumboza luyi-4–8 μm kuphela—luzacile kakhulu kune-hot-dip galvanizing (50–80 μm)—kodwa luhlinzeka ngokuvikeleka okuphezulu kokugqwala. Ingaphezulu eliqediwe linokubukeka kwensimbi efanayo kwesiliva-grey.

Ukwakheka okubalulekile: ama-zinc flakes (60–80%) okuvikela okomhlatshelo, impushana ye-aluminium (5–15%) yezindawo zokuvimbela ezithuthukisiwe, i-inorganic binder edlula phezulu, namanzi akhishwe njenge-deionized njengendlela yokuthwala.

3. Izinzuzo ezibalulekile ze-Dacromet Hexagonal Bolts

3.1 Ukumelana Nokugqwala Okukhethekile

I-4–8 μm ye-Dacromet enamathela ngokuvamile imelana namahora angaphezu kuka-1,000–1,200 wokuhlolwa kwesifutho sikasawoti esingathathi hlangothi (ASTM B117) ngaphandle kokugqwala okubomvu—izikhathi ezicishe zibe ngu-7 kuya kweziyi-10 ukusebenza kwe-electro-galvanizing (amahora angu-100–300). Amabanga asebenza kahle kakhulu angadlula amahora angu-2,000. Isakhiwo se-flake esinezendlalelo eziningi sisebenza njengesivimbelo esibonakalayo kanye ne-anode yomhlatshelo, ehlinzeka ngokuvikeleka kwesikhathi eside ezindaweni ezisogwini, izimboni, kanye nemigwaqo kasawoti.

3.2 Inkululeko Ekuthuthukisweni Kwe-Hydrogen

I-electroplating evamile ihilela ukucolwa kwe-asidi kanye ne-electrolysis, engase yethule i-hydrogen ensimbi enamandla amakhulu futhi ibangele ukuphuka okubambezelekayo okulibazisekayo—ikakhulukazi okubaluleke kakhulu kumabhawodi eBanga le-10.9 no-12.9. Inqubo ye-Dacromet isebenzisa kuphela ukuhlanzwa kwemishini kanye nesicelo esingeyona i-electrolytic, iqeda ngokuphelele ingozi yokukhishwa kwe-hydrogen. Lokhu kuyenza ibe uqweqwe oluncanyelwayo lwamabhawodi ane-hexagonal abaluleke kakhulu kwezokuphepha.

3.3 Ukumelana Nokushisa Okuvelele

Izingubo ze-Dacromet zihlala zizinzile futhi zivikela emazingeni okushisa aqhubekayo afinyelela ku-300 ° C. Izingubo ezivamile ze-zinc ziqala ukuwohloka ngaphezu kuka-70-100°C futhi zingaxebuka ku-200-300°C. Lokhu kuzinza kwe-thermal kwenza amabhawodi e-Dacromet ane-hexagonal alungele amagumbi enjini, amasistimu e-exhaust, kanye nezindawo zezimboni ezinezinga eliphezulu lokushisa.

3.4 Ukuzinza Kwe-Dimensional kanye Nokuhambisana Kwentambo

I-ultra-thin, i-conformal coating ayiguquli kakhulu ubukhulu bentambo noma ububanzi bephimbo. Amantongomane ahlangana ngokushelela ngaphandle kokuthepha okungaphezu kokuvamile okudingekayo ngemva kokushiswa kwediphu eshisayo. I-coating iphinde ingene emigodini ejulile, i-recesses, nezindawo zangaphakathi i-electroplating engakwazi ukuyivikela ngokuthembekile. Ngaphezu kwalokho, ifilimu ibophezela ngokuqinile ku-substrate futhi yamukela ukugqoka okulandelayo okuphilayo noma amapende ngokunamathela okuhle kakhulu.

4. Inqubo Yokukhiqiza Nokwemboza

Amabhawodi angama-hexagonal ngokuvamile akhiqizwa kusukela ku-medium-carbon noma i-alloy steel ngesihloko esibandayo noma ukubumba okushisayo, okulandelwa ukugoqwa kwentambo nokwelashwa kokushisa ukuze kuzuzwe isigaba sendawo esidingekayo (ngokuvamile u-8.8, 10.9, noma 12.9). Ngemuva kokuhlanza ngokuphelele, i-Dacromet coating isetshenziswa ngale ndlela elandelayo:

1. Ukulungiswa kwendawo: Ukususwa kwe-alkaline nokuhlanzwa kwe-abrasive ngomshini (akukho ukucotshwa kwe-asidi).

2.Ukufaka isicelo: Ukucwiliswa kwe-Dip-spin yezinsimbi eziningi noma ukufafaza izingxenye ezinkulu; ukugqoka okwedlulele kususwe yi-centrifugation.

3. Ukwelapha: Ukubhaka cishe ku-300-320 ° C imizuzu engu-15-30 ukwakha isakhiwo se-flake sokuzivikela.

4.Ijazi langaphezulu ongazikhethela lona: Isitywini noma okokugcoba kungase kusetshenziswe ukuthuthukisa ukumelana nokugqwala nokulawula i-coefficient yokungqubuzana.

5. Izicelo Ezijwayelekile

Amabhawodi e-Dacromet hexagonal acaciswa kabanzi lapho ukwethembeka kwesikhathi eside ngaphansi kwezimo ezibolayo noma ezisezingeni lokushisa kubalulekile:

Ezezimoto: I-chassis, ukumiswa, amasistimu amabhuleki, izingxenyekazi zekhompathi yenjini, nezingxenye zangaphansi ezivezwe kusawoti womgwaqo.

Amandla omoya nokudluliswa kwamandla: Amabhawodi ombhoshongo nezinsimbi zokubopha zesakhiwo kuma-offshore and coastal wind turbines.

Osolwandle nasolwandle: Izingxenyekazi zekhompuyutha zedekhi kanye nezakhiwo zepulatifomu zivezwe esifuthweni samanzi anosawoti esiqhubekayo.

Ezokwakha nengqalasizinda: Izixhumanisi zohlaka lwensimbi, izingxenye zebhuloho, namajoyinti esakhiwo angaphandle.

Uloliwe, imishini esindayo, i-aerospace nokuvikela: Amaphuzu okuqiniswa anamandla aphezulu angaphansi kokudlidliza, isimo sezulu, kanye nengcindezi yokusebenza.

6. Ukuqhathanisa Nezingubo Zomdabu

Umehluko obalulekile wokusebenza ugqamisa ukuthi kungani i-Dacromet ikhethwa kumabhawodi angamahexagonal asebenza kahle kakhulu:

Ubukhulu be-coating: I-Dacromet 4–8 μm  |  I-Electro-galvanizing 5–15 μm  |  I-Hot-dip galvanizing 50–80 μm

Ukumelana nesifutho sikasawoti (akukho ukugqwala okubomvu): I-Dacromet ≥1,200 h  |  I-electro-galvanizing 100–300 h  |  I-Hot-dip 500–800 h

Ingozi ye-hydrogen embrittlement: I-Dacromet - Akukho  |  Electro-galvanizing – High  |  Idiphu elishisayo – Medium

Ukumelana nezinga lokushisa eliphezulu: I-Dacromet efika ku-300°C  |  I-Electro-galvanizing ≤100°C  |  Idiphu elishisayo ≤200°C

Ukulingana kochungechunge: I-Dacromet igcina ukubekezelelana okunembile; i-hot-dip galvanizing ngokuvamile idinga isinxephezelo sentambo.

7. Amazinga, Amabanga, kanye Nemininingwane

Amabhawodi e-Dacromet ane-hexagonal akhiqizwa ngokwezindinganiso zamazwe ngamazwe okuhlanganisa i-ISO 4014/4017, DIN 931/933, ANSI/ASME B18.2.1, kanye ne-GB/T 5782/5783. Amakilasi ezakhiwo ezivamile angu-4.8, 8.8, 10.9, no-12.9 (metric) noma iBanga lesi-5 neBanga lesi-8 (intshi). Izinto ezisetshenziswayo zifaka i-carbon steel ne-alloy steels njenge-35CrMo, 40Cr, ne-42CrMo. Ibanga losayizi ojwayelekile lingu-M5 ukuya ku-M36 (osayizi abakhulu batholakalela izinhlelo zokusebenza ezikhethekile), ekucushweni okugcwele uchungechunge noma ingxenye. Ama-OEM amaningi ezimoto aklelisa i-Dacromet noma okufana ne-zinc-flake coatings njengokuqedwa okugunyaziwe kwezibophelelo zamandla aphezulu.

8. Ukucatshangelwa kwemvelo

Ukwakhiwa kwe-Dacromet yosiko kuqukethe i-chromium ene-hexavalent kusibophezelo. Nakuba ukugqoka okuphulukisiwe kuzinzile futhi inqubo ikhiqiza amanzi angcolile amancane kakhulu kune-electroplating, imithetho yemvelo iqhubekisele phambili ukuthuthukiswa kwezindlela ezihlukile ezingenayo i-chromium njenge-Geomt® nezinye izinhlelo zesimanje ze-zinc-flake. Lezi zigcina izinzuzo zokusebenza eziyinhloko ze-Dacromet ngenkathi zihlangabezana nezimfuneko eziqinile ze-RoHS kanye ne-REACH.

Sekukonke, inqubo ye-Dacromet ibhekwa njengobungani bemvelo kune-electro-galvanizing evamile ngoba iqeda okugeza nge-asidi, izixazululo ze-cyanide, nokwelashwa kwamanzi angcolile okubanzi. Ikhemikhali esekwe emanzini iphinda ibangele ukukhishwa kwe-volatile organic compound (VOC) ephansi.

9. Isiphetho

Amabhawodi we-Dacromet hexagonal anikezela ngesixazululo esisebenza kahle kakhulu sezinhlelo zokusebenza ezidinga ukwethembeka komshini kanye nokuvikelwa kokugqwala kwesikhathi eside. Inhlanganisela yazo yoqweqwe oluncane kakhulu kodwa olusebenza kahle kakhulu, ukukhululeka okuphelele embrittlement ye-hydrogen, ukumelana nokushisa okuhle kakhulu, nokulawula okunembayo kwe-dimensional kuyenza ibe wusizo ikakhulukazi ezixhunyweni eziqinile emikhakheni yezimoto, yamandla, yasolwandle, neyobunjiniyela besakhiwo.

Njengoba imithethonqubo yezemvelo ithuthuka, okokugcotshwa kwe-zinc-flake angenayo i-chromium etholakala kubuchwepheshe bokuqala be-Dacromet iyaqhubeka nokwandisa ububanzi bezinketho ezihambisanayo. Kungakhathaliseki ukuthi kucaciswe njenge-Dacromet yakudala noma okulinganayo kwesimanje, lawa mabhawodi anama-hexagonal aboshwe aletha ukuqina okuqinisekisiwe okunweba kakhulu impilo yesevisi futhi kunciphisa izindleko zokulungisa ezindaweni ezibolayo nezinezinga lokushisa eliphezulu. Emajoyini abalulekile lapho ukwehluleka kungeyona inketho, amabhawodi e-Dacromet ane-hexagonal ahlala enesinye sezixazululo ezithembekile nezithuthuke kakhulu ezitholakala namuhla.