Kukula kwa utoto wa chrome waulere wa dacromet

Adalemba pa 2016-12-22Amadziwika bwino kuti Dacromet ndi dispersible amadzimadzi yankho wopangidwa ndi zinc flake, aluminium flake ndi zina.Workpieces pambuyo kuviika ndi kupopera mbewu mankhwalawa, kuchiritsa 20min pa 80 ℃ mu chisanadze Kutentha ng'anjo, 30min pa 300 ℃ pa kuchiritsa ng'anjo.Pangani hexavalent chromium anali adipic mowa ndi organic kuchepetsa mu madzimadzi dacromet ❖ kuyanika si kupasuka m'madzi.
Dziwani kuti kuchepetsedwa kwa chromium ya hexavalent kukhala trivalent chromium ndi trivalent chromium oxidation kukhala hexavalent chromium ndi njira yosinthira.Chifukwa chake, mu sintered workpiece, trivalent chromium ipitilira kukhala oxid kukhala hexavalent chromium, ndipo hexavalent chromium ndi carcinogen, kotero kukhudzana kumabweretsa thanzi.Chifukwa chake, njira yachikhalidwe yokhala ndi chromium yokhala ndi zokutira sizotulutsa ziro, bola ngati kukhalapo kwa chromium ya hexavalent, kumakhala ndi zotsatirapo zina pa chilengedwe ndi anthu, chifukwa chake, kutchuka kwa Dacromet yaulere ndikofunikira.
Ndi ntchito zoteteza zachilengedwe zikupitilirabe kukulirakulira, opanga zida zamagalimoto ochulukirachulukira amafunikira zida zokutira za chrome zaulere za dacromet.Ndipo adapanganso miyezo yaukadaulo ya chrome yaulere ya dacromet.Monga Volkswagen GMW3359, GM7111M etc.
Chrome yaulere Dacromet imayang'ana makamaka zinthu zina m'malo mwa chromic acid passivation ndi kugwirizana.Chophimba cha Chrome chaulere cha Dacromet makamaka chimagwiritsa ntchito silicon, inorganic silicon, molybdate, tungstate, phosphate ngati binder, kugwiritsa ntchito scaly zinc / aluminium flake monga gawo lalikulu la filler, komanso kudzera mu chisindikizo cha Post-mankhwala, kuti mukwaniritse zomwezo. kukana dzimbiri ndi zokutira za Dacromet zokhala ndi chromium.
Ukadaulo waulere wa Chrome Dacromet sikuti umangokhala ndi mwayi waukadaulo wa chromium-dacromet, komanso kuchokera pakukonzekera utoto, zokutira, filimu, kudzipaka palokha kulibe chromium ya hexavalent, lingaliro lenileni la kuzindikira kobiriwira kopanda poizoni wopanda vuto.Malinga ndi chilengedwe, padziko lonse lapansi chrome free Dacromet m'malo mwa chrome dacromet general direction sidzasintha, idzabweretsa gawo latsopano la sayansi ya anti-corrosion ya kusintha kwa chilengedwe.