一、電泳漆電導率正常范圍是多少
電泳漆是一種基于電化學原理的涂料技術,是通過在帶電的涂料顆粒上附著金屬工件,從而形成涂層。電泳涂裝技術具有成本低、涂裝效率高、也能保證涂層附著力強等優點。其中電導率是影響電泳漆涂裝(zhuang)效果的重要(yao)參數。
電(dian)(dian)(dian)導(dao)(dao)(dao)率(lv)(lv)是(shi)物質(zhi)對電(dian)(dian)(dian)流的(de)(de)導(dao)(dao)(dao)電(dian)(dian)(dian)能力,是(shi)電(dian)(dian)(dian)泳(yong)(yong)(yong)漆(qi)涂裝(zhuang)過(guo)(guo)程中的(de)(de)重(zhong)要參考參數。在(zai)涂裝(zhuang)前需要測量電(dian)(dian)(dian)泳(yong)(yong)(yong)漆(qi)的(de)(de)電(dian)(dian)(dian)導(dao)(dao)(dao)率(lv)(lv),以保證涂裝(zhuang)質(zhi)量。電(dian)(dian)(dian)泳(yong)(yong)(yong)漆(qi)電(dian)(dian)(dian)導(dao)(dao)(dao)率(lv)(lv)的(de)(de)正(zheng)常(chang)范(fan)圍(wei)一(yi)般(ban)在(zai)1-10 mS/cm之(zhi)間,具體數值還(huan)受到(dao)諸如溫度、濕度等因素的(de)(de)影響。若(ruo)電(dian)(dian)(dian)導(dao)(dao)(dao)率(lv)(lv)過(guo)(guo)高(gao),說明電(dian)(dian)(dian)泳(yong)(yong)(yong)漆(qi)中電(dian)(dian)(dian)解質(zhi)濃度過(guo)(guo)高(gao);若(ruo)電(dian)(dian)(dian)導(dao)(dao)(dao)率(lv)(lv)過(guo)(guo)低,則說明涂料成(cheng)分缺失。因此(ci),在(zai)電(dian)(dian)(dian)泳(yong)(yong)(yong)漆(qi)涂裝(zhuang)前一(yi)定(ding)要檢查電(dian)(dian)(dian)導(dao)(dao)(dao)率(lv)(lv)是(shi)否(fou)在(zai)正(zheng)常(chang)范(fan)圍(wei)內(nei)。
二、電泳漆的電導偏低怎么調節
電(dian)泳(yong)漆的電(dian)導(dao)偏(pian)低會(hui)嚴重影響生產(chan)(chan)效率和生產(chan)(chan)質量,必須及時(shi)找到原因并進(jin)行調(diao)整。以下是一(yi)些常(chang)見的調(diao)節方(fang)法(fa),可以根(gen)據具體情況(kuang)選擇適宜的方(fang)法(fa)進(jin)行調(diao)節。
1、添加電導率增強劑
如果(guo)是由于(yu)水質問題(ti)導(dao)致電(dian)(dian)泳漆電(dian)(dian)導(dao)偏低,可(ke)以(yi)添(tian)加電(dian)(dian)導(dao)率(lv)(lv)(lv)增(zeng)強(qiang)劑(ji)。常用的(de)(de)電(dian)(dian)導(dao)率(lv)(lv)(lv)增(zeng)強(qiang)劑(ji)包括聚(ju)乙二醇、甘油(you)、石蠟等,在電(dian)(dian)泳槽(cao)中添(tian)加適(shi)量的(de)(de)電(dian)(dian)導(dao)率(lv)(lv)(lv)增(zeng)強(qiang)劑(ji)可(ke)以(yi)有(you)效提升電(dian)(dian)泳漆的(de)(de)電(dian)(dian)導(dao)率(lv)(lv)(lv)。
2、更換水質
如(ru)果是水(shui)(shui)質(zhi)問題導致(zhi)電(dian)泳漆電(dian)導偏低,可(ke)以(yi)更換高質(zhi)量的(de)水(shui)(shui)源,如(ru)去離(li)子水(shui)(shui)等。保(bao)證水(shui)(shui)質(zhi)清潔,水(shui)(shui)溫(wen)適中,可(ke)以(yi)顯著提升電(dian)泳漆的(de)電(dian)導率。
3、修復電極
如果電(dian)極表面發生腐蝕或(huo)者老化,可以(yi)(yi)進行修(xiu)復或(huo)更(geng)換。修(xiu)復電(dian)極表面可以(yi)(yi)嘗(chang)試(shi)采用噴砂、刮砂、加電(dian)鍍等方法,讓電(dian)極表面變得比(bi)較(jiao)光滑,提高其導電(dian)能(neng)力(li)。
4、檢查配方
如果問(wen)題是(shi)由于配方不平衡導(dao)致電(dian)(dian)泳(yong)液(ye)電(dian)(dian)導(dao)偏低(di),則(ze)需要檢查配方并進行調整。可以增(zeng)加(jia)(jia)金屬螯(ao)合劑(ji)和(he)去離子水之類的(de)添加(jia)(jia)劑(ji),增(zeng)強其導(dao)電(dian)(dian)能力。
三、電泳漆電導率的測量方法
電泳漆(qi)(qi)電導(dao)率的(de)測(ce)量方(fang)法(fa)是通過電導(dao)計等(deng)(deng)儀器進行(xing)測(ce)量。通常情況下,電泳漆(qi)(qi)涂(tu)裝廠家(jia)會向用戶提供相應的(de)測(ce)量儀器,用戶可按照說明書進行(xing)操作。在進行(xing)測(ce)量時,需要注意電泳漆(qi)(qi)的(de)溫度與密度,以及電極(ji)的(de)離(li)子濃度等(deng)(deng)因素。