I-Dacromet Bolts: ukuKhuselwa okuPhakamileyo kokuTyalwa kunye nokuThintelwa kweRust kubunjineli banamhlanje 

2. Ukuqonda iTekhnoloji yokuCoating yeDacromet

2.1 Ukubunjwa kunye neSakhiwo

I-Dacromet yinkqubo yokugqoka i-zinc-flake ye-proprietary eyenzelwe ngokukodwa ukhuseleko lwe-corrosion ephezulu yokusebenza. Utyatyazo luqulathe i-zinc microscopic kunye neeflakes zealuminiyam ezixhonywe kwi-inorganic binder matrix, ngokwesiqhelo esekwe kwichromium oxides okanye iikhompawundi ezifanayo. Xa ifakwe kwi-bolt kwaye emva koko iphiliswe ngenkqubo yokubhaka elawulwayo, ezi flakes zilungelelanisa kwiileyile ezininzi, zenza i-dense, i-lamellar barrier ethintela ngokufanelekileyo ukungena kwemithombo yeendaba ezinobungozi ezifana namanzi, i-oksijini kunye ne-chloride ion.

Ubungqingqwa befilimu obuqhelekileyo beDacromet yokwambathisa kwibholithi busuka malunga ne-5 ukuya kwi-15 yeemicrometer. Nangona le nkcazo incinci, i-multilayered structure ibonelela ngeepropati ezinqabileyo zomqobo. Iiflake ze-zinc zisebenza ngokuzincama, ngokukhetha ukugqwesa ukukhusela i-substrate yentsimbi, ngelixa izixhobo ze-aluminium ziphucula ukuzinza kunye neempawu zokugqithisa. Le ndlela yokwenza izinto ezimbini ibalulekile ekukhuseleni umhlwa okugqwesileyo kunye nokusebenza kokuthintela umhlwa okwahlula iibholiti ze-Dacromet kwizibophelelo eziqhelekileyo ezigqunyiweyo.

2.2 Inkqubo yesicelo

Inkqubo yokugqoka i-Dacromet iqala ngokulungiswa okucokisekileyo komphezulu webholithi ukuze kuqinisekiswe ukunamathela ngokufanelekileyo. I-fastener ecocekileyo ifakwe ngaphakathi okanye itshizwe nge-zinc-aluminium slurry yamanzi. Emva kokufaka isicelo, ibholithi egqunyiweyo ijongana nomjikelo olawulwa ngononophelo wokunyanga kumaqondo obushushu aphakamileyo. Ngexesha lonyango lwe-thermal, i-inorganic binder crosslinks kunye ne-metallic flakes sinter ibe yifilimu eqhubekayo, ebambelelayo enika ukhuseleko oluhlala luhleli.

Enye yezona zinto zibalulekileyo zenkqubo ye-Dacromet yeebholiti kukungabikho kokucholwa kweasidi enoburharha kwiinkqubo ezininzi ezahlukeneyo. I-electroplating yendabuko isoloko ifuna ukucocwa kwe-asidi eqinile, enokuthi ingenise i-hydrogen ibe yintsimbi ephezulu kwaye ikhokelele kwi-hydrogen embrittlement. Ngokunciphisa okanye ukuphelisa lo mngcipheko, i-Dacromet coating igcina ingqibelelo yomatshini yeebholiti eziphezulu ngelixa ihambisa ukhuseleko olubalaseleyo lokutya kunye nokuthintela umhlwa ixesha elide.

3. UKhuseleko lokuMhlwa kunye noMsebenzi woThintelo lomhlwa

3.1 Ukusebenza kweLebhu

Izakhono zokukhusela i-corrosion bolts ze-Dacromet bolts zixhaphake kakhulu ngokuvavanywa kokungathathi hlangothi kwetyuwa ngokuhambelana nemigangatho ye-ASTM B117 okanye i-ISO 9227. Iingubo eziphakamileyo ze-Dacromet zihlala zifezekisa i-720 kwiiyure ezingaphezu kwe-1,000 zokuvezwa ngaphambi kokubonakala kwe-rust ebomvu kwi-bolt surface. Kwimixube emininzi ephucukileyo ebandakanya izitywini ezongezelelweyo okanye iidyasi eziphezulu, ukusebenza kunokugqithisa i-1,500 okanye iiyure ezingama-2,000. Eli nqanaba lothintelo lomhlwa liyodlula lee i-zinc electroplating eqhelekileyo kwaye isoloko igqwesa ukugalela idiphu yesiqhelo eshushu phantsi kweemeko zovavanyo ezifanayo.

Ngaphaya kokuvavanywa kokutshiza kwetyuwa okumileyo, iibholiti ze-Dacromet zibonisa ukuxhathisa okugqwesileyo kuvavanyo lwe-cyclic corrosion olubonisa ngokusondeleyo ngakumbi ukuvezwa kwehlabathi lokwenyani. Ezi prothokholi zibandakanya ukutshintshisana kwamaxesha enkungu yetyuwa, ukufuma, kunye nokomisa, umngeni kumandla okugquma ukugcina ukhuseleko lomqobo oqhubekayo. Isakhiwo se-zinc-aluminiyam esakhiweyo se-Dacromet siphendula ngokufanelekileyo kwiimeko ezinjalo eziguquguqukayo, zigcina ukhuseleko oluthembekileyo lwe-corrosion nasemva kwemijikelezo yokuvezwa kwexesha elide kunye nobudlova.

3.2 IiNdlela zoKhuselo

Ukhuseleko oluphezulu lwe-corrosion olunikezelwa yi-Dacromet bolts iziphumo ezivela kwiindlela ezininzi ze-synergistic. Okokuqala, isithintelo somzimba esidalwe ngamacangci esinyithi aqengqelekayo sithintela ukusasazwa kwamanzi, ioksijini, kunye ne-chloride ion ukuya kwi-substrate yentsimbi. Okwesibini, isenzo sombingelelo we-zinc flakes sinika ukukhuselwa kwe-cathodic kuyo nayiphi na i-discontinuities microscopic kwi-coating. Okwesithathu, ukwakhiwa kweemveliso ezizinzileyo ze-corrosion kunye neefilim ze-passivation zongeza ngakumbi uthintelo lwexesha elide lomhlwa ngokutywina iindlela ezinokubakho zokuhlaselwa ngakumbi. Esi sicwangciso sokhuselo esinamanqanaba amaninzi sivumela iibholiti ezigqunywe ngeDacromet ukuba zigcine ingqibelelo yesakhiwo kunye nokubonakala ixesha elide kunezibophelelo ezingaphathwanga okanye ezigqunywe ngokuqhelekileyo.

4. Izinto eziluncedo eziphambili zeDacromet Bolts

Inkululeko kwi-Hydrogen Embrittlement: Iibholiti eziphezulu, ngokukodwa ezo zeklasi zepropathi ze-10.9 kunye ne-12.9, zithinteka kakhulu kwi-hydrogen embrittlement xa zixhomekeke kwiinkqubo ze-electroplating zendabuko. Ukufunxwa kwe-athom ye-athom ye-hydrogen ngexesha lokucoca i-asidi okanye ukubekwa kwe-electrolytic kunokukhokelela ekulibazisekeni kokuqhekeka kwe-brittle phantsi komthwalo onzima. Itekhnoloji yokwaleka i-Dacromet isusa kakhulu le nkxalabo kuba inkqubo ayibandakanyi isizukulwana se-hydrogen ye-electrolytic kwaye ihlala ikuphepha ukunyangwa kwe-asidi eyomeleleyo. Ngenxa yoko, iinjineli zinokucacisa iibholiti ze-Dacromet eziphezulu ezinokuzithemba ngokuzithemba ukuba ukukhuselwa kwe-corrosion akuyi kuphazamisa ukuthembeka komatshini okanye ukhuseleko.

Umtyana oMncinci, oFanayo, kunye noZinzileyo: Ngokungafaniyo ne-hot-dip galvanizing, enokuthi ifake i-zinc layers engqindilili kwaye ngamanye amaxesha ingalinganiyo ephazamisana nentambo kunye nobudlelwane be-torque-tension, iingubo ze-Dacromet zibonakala zincinci kwaye zifana kakhulu. Ubungqingqwa befilimu obuqhelekileyo obuyi-5–15 µm buqinisekisa ukuba ibholithi esemgangathweni kunye nokunyamezelana kwamandongomane kuhlala kuhambelana ngaphandle kwesidingo samandongomane akhethekileyo okanye ukunqunyulwa kweentambo. Olu zinzo lune-dimensional lubaluleke kakhulu kwiindibano ezichanekileyo kunye nemisebenzi yokuqinisa i-automated apho imithwalo ye-clamp engaguqukiyo ibalulekile.

Okugqwesileyo kokumelana nobushushu kunye nokuzinza kweMichiza: Iingubo ze-Dacromet zibonisa ukuzinza okumangalisayo kwe-thermal, ukugcina ukukhuselwa okusebenzayo kwe-corrosion kunye nokukhusela i-rust kubushushu benkonzo eqhubekayo ukuya malunga ne-250-300 ° C, kuxhomekeke kwi-formulation ethile. Oku kuxhathisa ukushisa kwenza ukuba iibholiti ze-Dacromet zilungele izicelo ezikufutshane neenjini, iinkqubo zokukhupha, ii-ovens zoshishino, kunye nezinye iindawo eziphakamileyo zokushisa apho iingubo eziphilayo ziya kuthotywa. Ukongeza, indalo ye-inorganic yokwambathisa ibonelela ngokuxhathisa okulungileyo kuluhlu lweekhemikhali zoshishino.

Ukungqubana okuLawulweyo kunye nokuSebenza kweNdibano: Iinkqubo ezininzi zeDacromet zibandakanya izitywini ezikhethekileyo okanye izithambiso ezivumela ulawulo oluchanekileyo kwi-coefficient of friction. Olu phawu lubalulekile ekufezekiseni ukulayisha kwangaphambili okungaguquguqukiyo kumalungu adityanisiweyo. Ngokunikezela ngokuziphatha okuqikelelwayo kwe-torque-tension, iibholiti ze-Dacromet zixhasa iinkqubo zendibano ezithembekileyo kunye nokunciphisa umngcipheko wokuqina ngaphantsi okanye ngaphezulu. Udibaniso olugqwesileyo lokukhuselwa kwe-corrosion, iimpawu ezizinzileyo ze-friction, kunye nenkululeko kwizikhundla ze-hydrogen embrittlement i-Dacromet njengonyango olukhethiweyo lwendawo yokukhusela ukhuseleko olubalulekileyo kunye ne-high-performance fasteners.