I-Dacromet Bolts: I-Superior Corrosion Protection and Rust Prevention for Modern Engineering 

2. Ukuqonda I-Dacromet Coating Technology

2.1 Ukubunjwa Nesakhiwo

I-Dacromet iwuhlelo lokuhlanganisa lwe-zinc-flake oluklanyelwe ngokukhethekile ukuvikela ukugqwala kokusebenza okuphezulu. I-coating iqukethe i-zinc microscopic egqagqene nama-flakes e-aluminium amiswe ku-matrix ye-inorganic binder, ngokuvamile esekelwe kuma-chromium oxides noma izinhlanganisela ezifanayo. Uma isetshenziswa kubhawodi bese ilashwa ngenqubo yokubhaka elawulwayo, lawa maflakes aqondana ezendlalelo eziningi, enze umgoqo ominyene, we-lamellar ovimbela ngokuphumelelayo ukungena kwemidiya egqwalayo njengamanzi, umoya-mpilo, nama-ion e-chloride.

Ugqinsi lwefilimu olujwayelekile lokumbozwa kwe-Dacromet kububanzi obusuka ku-5 kuye ku-15 micrometer. Naphezu kwale phrofayili encane, isakhiwo esinezingqimba eziningi sinikeza izakhiwo ezingavamile zokuvimbela. Ama-zinc flakes asebenza ngokuzidela, agqwala ngokukhethekile ukuze avikele i-substrate yensimbi, kuyilapho izingxenye ze-aluminium zithuthukisa ukuqina nezici zokuphefumula. Le ndlela yokwenza izinto ezimbili ibalulekile ekuvikeleni ukugqwala okuvelele nokusebenza kokuvimbela ukugqwala okuhlukanisa amabhawodi e-Dacromet kuzibopheli ezimboziwe ezivamile.

2.2 Inqubo Yesicelo

Inqubo yokugqoka i-Dacromet iqala ngokulungiswa okuphelele kwendawo yebhawudi ukuze kuqinisekiswe ukunamathela okuhle. I-fastener ehlanzekile ibe isicwiliswa ngaphakathi noma ifuthwe nge-zinc-aluminium slurry esekelwe emanzini. Ngemuva kokufakwa, ibhawudi eliboshwe libhekana nomjikelezo wokwelapha olawulwa ngokucophelela emazingeni okushisa aphakeme. Phakathi nalokhu kwelashwa okushisayo, i-inorganic binder crosslinks kanye nama-metallic flakes sinter ibe ifilimu eqhubekayo, ebambelelayo ehlinzeka ngokuvikeleka kokugqwala okuqinile.

Enye yezinzuzo ezibaluleke kakhulu zenqubo ye-Dacromet yamabhawodi ukungabi bikho kokuchotshozwa kwe-asidi okunolaka ezinhlobonhlobo zezinqubo eziningi. I-electroplating evamile ngokuvamile idinga ukuhlanzwa kwe-asidi eqinile, okungangenisa i-hydrogen ezinsimbini zamandla aphezulu futhi kuholele ekugqitheni kwe-hydrogen. Ngokunciphisa noma ukuqeda le ngozi, i-Dacromet coating igcina ubuqotho bomshini wamabhawudo aqinile ngenkathi sisaletha ukuvikelwa kokugqwala okuvelele kanye nokuvimbela ukugqwala kwesikhathi eside.

3. Ukuvikela Ukugqwala kanye Nokusebenza Kokuvimbela Ukugqwala

3.1 Ukusebenza Kwelabhorethri

Amandla okuvikela ukugqwala kwamabhawodi e-Dacromet avamise ukulinganiswa ngokuhlolwa kwesifutho sikasawoti esingathathi hlangothi ngokuya ngamazinga we-ASTM B117 noma we-ISO 9227. Izembatho ze-Dacromet ezisezingeni eliphakeme ngokuvamile zifinyelela ku-720 kuya kumahora angaphezu kuka-1,000 wokuchayeka ngaphambi kokuvela kokugqwala okubomvu endaweni yebhawodi. Ekwakhekeni okuningi okuthuthukile okufaka ama-sealer engeziwe noma amajazi angaphezulu, ukusebenza kungadlula amahora angu-1,500 noma angu-2,000. Leli zinga lokuvimbela ukugqwala lidlula kude i-zinc electroplating evamile futhi livame ukudlula ugesi ovamile we-hot-dip ngaphansi kwezimo zokuhlola ezifanayo.

Ngale kokuhlolwa kwesifutho sikasawoti esimile, amabhawodi e-Dacromet akhombisa ukumelana okuhle kakhulu nokuhlolwa kokugqwala okujikelezayo okulingisa ngokuseduze ukuchayeka emhlabeni wangempela. Lezi zimiso zifaka phakathi izikhathi ezishintshayo zenkungu kasawoti, umswakama, nokomisa, okubekela inselele ikhono lokumboza lokulondoloza ukuvikeleka kwesithiyo esiqhubekayo. Isakhiwo se-zinc-aluminium enezingqimba se-Dacromet siphendula ngempumelelo ezimweni ezinjalo eziguqukayo, sigcina ukuvikelwa kokugqwala okuthembekile ngisho nangemva kwemijikelezo yokuchayeka ende futhi enolaka.

3.2 Izindlela Zokuvikela

Ukuvikelwa kokugqwala okuphezulu okunikezwa yi-Dacromet bolts kuphumela ezindleleni ezimbalwa ze-synergistic. Okokuqala, umgoqo ongokoqobo odalwe ama-metallic flakes agqagqene uvimbela ukusatshalaliswa kwamanzi, umoya-mpilo, nama-ion e-chloride ngasengxenyeni yensimbi. Okwesibili, isenzo somhlatshelo we-zinc flakes sinikeza ukuvikeleka kwe-cathodic kunoma yikuphi ukunqanyulwa kwe-microscopic ekugqokeni. Okwesithathu, ukwakhiwa kwemikhiqizo yokugqwala okuzinzile kanye namafilimu e-passivation kuthuthukisa futhi ukuvimbela ukugqwala kwesikhathi eside ngokuvala izindlela ezingase zibe khona zokuhlasela okwengeziwe. Leli su lokuvikela elinezendlalelo eziningi livumela amabhawodi ahlanganiswe yi-Dacromet ukuthi agcine ubuqotho besakhiwo nokubukeka isikhathi eside kunezibophelelo ezingalashiwe noma eziboshwe ngendlela evamile.

4. Izinzuzo ezibalulekile ze-Dacromet Bolts

Inkululeko Evela Ku-Hydrogen Embrittlement: Amabhawodi anamandla aphezulu, ikakhulukazi lawo ezigaba zezakhiwo 10.9 kanye no-12.9, asengozini enkulu yokuhoxiswa kwe-hydrogen uma engaphansi kwezinqubo zendabuko ze-electroplating. Ukumuncwa kwe-athomu ye-hydrogen ngesikhathi sokuhlanza i-asidi noma ukufakwa kwe-electrolytic kungaholela ekubambezelekeni kokuphuka kwe-brittle ngaphansi komthwalo oqinile. Ubuchwepheshe bokugqoka i-Dacromet buqeda kakhulu lokhu kukhathazeka ngoba inqubo ayibandakanyi isizukulwane se-electrolytic hydrogen futhi ngokuvamile igwema ukwelashwa kwangaphambili kwe-asidi eqinile. Ngenxa yalokho, onjiniyela bangacacisa amabhawodi e-Dacromet aqinile ngokuzethemba ukuthi ukuvikela ukugqwala ngeke kubeke engcupheni ukwethembeka noma ukuphepha kwemishini.

I-Coating Ezacile, Efanayo, Nezinzile: Ngokungafani ne-hot-dip galvanizing, engafaka izendlalelo ze-zinc eziwugqinsi futhi ngezinye izikhathi ezingalingani eziphazamisa ukulingana kwentambo kanye nobudlelwano be-torque-tension, ama-Dacromet anezimbobo zincane futhi zifana kakhulu. Ubukhulu befilimu obujwayelekile obungu-5–15 µm buqinisekisa ukuthi ukubekezelelwa kwebhawodi namantongomane kuhlala kuhambisana ngaphandle kwesidingo samantongomane akhethekile amakhulu noma ukunqunywa ngaphansi kwemicu. Lokhu kuzinza kohlangothi kubaluleke kakhulu ekuhlanganiseni okunembayo nasekusebenzeni kokuziqinisa okuzenzakalelayo lapho imithwalo yokubopha engashintshi ibalulekile.

Ukumelana Nokushisa Okuhle Kakhulu kanye Nokuqina Kwamakhemikhali: Izembatho ze-Dacromet zibonisa ukuzinza okushisayo okumangalisayo, zigcina ukuvikelwa kokugqwala okuphumelelayo nokuvimbela ukugqwala emazingeni okushisa esevisi aqhubekayo afinyelela cishe ku-250-300 ° C, kuye ngokwakhiwa okuqondile. Lokhu kumelana nokushisa kwenza amabhawodi e-Dacromet afanelekele izinhlelo zokusebenza eziseduze nezinjini, izinhlelo zokukhipha umoya, amahhavini ezimboni, nezinye izindawo ezisezingeni lokushisa eziphakeme lapho okokumbozwa kwemvelo kungawohloka. Ukwengeza, imvelo ye-inorganic ye-coating inikeza ukumelana okuhle nohlu lwamakhemikhali ezimboni.

Ukungqubuzana okulawulwayo nokusebenza komhlangano: Amasistimu amaningi e-Dacromet ahlanganisa ama-sealers akhethekile noma izinto zokugcoba ezivumela ukulawula okunembile phezu kwe-coefficient of friction. Lesi sici sibalulekile ukuze kuzuzwe ukulayishwa kusengaphambili okungaguquguquki kumajoyinti abholidi. Ngokuhlinzeka ngokuziphatha okubikezelwa kwe-torque-tension, amabhawodi e-Dacromet asekela izinqubo zokuhlanganisa ezinokwethenjelwa futhi anciphise ubungozi bokuqina kancane noma ngokweqile. Inhlanganisela yokuvikela ukugqwala okuhle kakhulu, izici eziqinile zokungqubuzana, kanye nokukhululeka ezikhundleni ze-hydrogen embrittlement i-Dacromet njengendlela yokwelapha engaphezulu ekhethwayo yezibophelelo ezibaluleke kakhulu zokuphepha nezisebenza kakhulu.