Indlela yokufumanisa iDacromet Iinkcukacha

Iposwe kwi 2015-05-14Okokuqala, imbonakalo:
Ekukhanyeni kwendalo ukukhanya, ngokujongwa kwamehlo.Ithoni esisiseko yokwambathisa i-zinc chromate kufuneka ibe ngwevu yesilivere, inokufumaneka ngokuguqulwa kweminye imibala, njengomnyama.I-zinc chromate coating kufuneka ibe yinto eqhubekayo, i-coatingless, i-bubbles, i-peeling, i-peeling, i-pitting, i-inclusions kunye nezinye iziphene.Ukwaleka kufuneka kufane kakhulu, kungabikho nto icacileyo yalapha engqindilili kakhulu.Ukugquma akufuneki kutshintshe umbala, kodwa kuvumela amabala amancinane atyheli.
Okwesibini, isixa sokutyabeka kunye nobukhulu bokugquma kovavanyo:
Isixa sokutyabeka esisemgangathweni sobukhulu bokugquma okanye ukugquma amabakala ahlukeneyo ahlulwe abe ngamabanga amane, iindlela ezimbini zinokusetyenziselwa ukufumanisa:

I-1, indlela yokulinganisa i-dissolution: ubunzima besampulu bukhulu kune-50g, isebenzisa ukuchaneka kwebhalansi ye-1mg eyayiyi-original mass W1 (mg), isampuli yafakwa kwi-70 ℃ ~ 80 ℃ ye-20% isisombululo se-NaOH samanzi, ukucwina i-10min, i-zinc. Ukwaleka kwechromium inyibilike ngokupheleleyo.Isampuli yathathwa, ihlanjwe kakuhle ngamanzi ngokukhawuleza emva kokumisa, isambatho sachithwa, wathi ubunzima besampula emva kwe-W2 (mg).Kwaye ubale ubungakanani bomphezulu wendawo ye-??i-workpiece S (dm2), ngokwefomula ilandelayo ukubala isixa sokutyabeka se-W (mg / dm2):
W = (W1-W2) / S

I-2, indlela ye-microscope: cinezela iimfuno ze-GB / T6462, usebenzisa i-microscope yokukhanya isetyenziselwe ukukhangela ubukhulu bokutya.
Okwesithathu, uvavanyo lwamandla okuncamathela:
Ukusebenzisa indlela yokuvavanya i-tape, amandla okubambelela afumanisa i-zinc chromate coating kunye ne-substrate, kunye novavanyo lweteyipu ngokweemfuno ze-GB / T5270-1985 kwicandelo 1.4.Emva kweemfuno zovavanyo ayikwazi ukuxotyulwa kwi-coating ukusuka kwi-substrate, okanye ivule ekupheleni, kodwa ivumela i-adhesive tape discoloration kunye ne-zinc, iinkozo ze-aluminium.
Uvavanyo lokumelana namanzi: Lo mzekelo wantywiliselwa kumanzi adityanisiweyo angama-40 ℃ ± 1 ℃, ukuntywiliselwa ngokuqhubekayo 240h, emva kokuba isampulu ikhutshiwe kwaye yomiswa kwiqondo lobushushu begumbi, emva koko uvavanyo lwamandla okunamathela, iziphumo zovavanyo kufuneka zihlangabezane neemfuno zamandla okuncamathela. uvavanyo.Uvavanyo lwamandla okubambelela kufuneka luqhutywe ngaphakathi kwe-2h ye-specimen yasuswa kwisithuba samanzi adibeneyo.Emva kovavanyo lokumelana namanzi, i-coating ayikwazi ukugqabhuka okanye ivuleke ekugqibeleni ukusuka kwi-substrate.