Hanyar gano Dacromet Cikakkun bayanai

An buga 2015-05-14Na farko, bayyanar:
A cikin haske na halitta, tare da kallon ido tsirara.Ainihin sautin tutiya chromate shafi ya kamata azurfa launin toka, kuma za a iya samu ta hanyar gyara wasu launuka, kamar baki.Tushen chromate na Zinc ya kamata ya kasance mai ci gaba, sutura mara kyau, kumfa, peeling, fatattaka, pitting, inclusions da sauran lahani.Ya kamata sutura ta zama iri ɗaya, babu wani abu na fili na gida mai kauri da yawa.Rufin bai kamata ya canza launi ba, amma yana ba da damar ƙananan raƙuman rawaya ya wanzu.
Na biyu, adadin sutura da kauri na gwajin:
Matsakaicin adadin murfin kauri ko suturar maki daban-daban zuwa kashi huɗu, ana iya amfani da hanyoyi biyu don ganowa:

1, narkar da auna Hanyar: samfurin nauyi ne mafi girma fiye da 50g, ma'aikata a daidaici na 1mg ma'auni wanda shi ne ainihin taro W1 (mg), da samfurin da aka sanya a cikin 70 ℃ ~ 80 ℃ na 20% NaOH ruwa bayani, soaking 10min, tutiya chromium shafi ya narkar da gaba daya.An fitar da samfurin, an wanke shi sosai da ruwa nan da nan bayan bushewa, an narkar da murfin, ya ce yawan samfurin gwajin bayan W2 (mg).Kuma ƙididdige adadin sararin samaniya na '' workpiece S (dm2), bisa ga dabarar da ke gaba don ƙididdige adadin shafi na W (mg / dm2):
W = (W1-W2) / S

2, Hanyar microscope: latsa buƙatun GB / T6462, ta amfani da microscope na gani an yi amfani da shi don gano kauri mai rufi.
Na uku, gwajin ƙarfin mannewa:
Yin amfani da hanyar gwajin tef, ƙarfin mannewa yana gano murfin chromate na zinc da substrate, da gwajin tef bisa ga buƙatun GB / T5270-1985 a cikin sashe na 1.4.Bayan gwajin buƙatun ba za a iya peeled kashe shafi daga substrate, ko bude a karshen, amma kyale m tef discoloration da zinc, aluminum hatsi.
Gwajin juriya na ruwa: An nutsar da samfurin a cikin ruwa mai narkewa 40 ℃ ± 1 ℃, ci gaba da nutsewa 240h, bayan an fitar da samfurin kuma an bushe shi a cikin zafin jiki, sannan gwajin ƙarfin mannewa, sakamakon gwajin yakamata ya dace da buƙatun ƙarfin mannewa. gwadawa.Ya kamata a gudanar da gwajin ƙarfin mannewa a cikin sa'o'i 2 an cire samfurin daga madaidaicin ruwa.Bayan gwajin juriya na ruwa, rufin ba zai iya flake ko budewa a karshen daga substrate ba.