東莞市卓鼎機械設備科技有限公司
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溶(rong)劑(ji)含量(liang)(liang)電泳(yong)漆中含有的(de)水溶(rong)性(xing)有機溶(rong)劑(ji)起助溶(rong)作(zuo)用,與其它涂料相比含量(liang)(liang)較小,可是它對膜(mo)厚和涂料穩定性(xing)有一定影響,一般要求(qiu)控制在一定范圍內。工(gong)作(zuo)液中的(de)溶(rong)劑(ji)含量(liang)(liang)增高,膜(mo)厚增厚,泳(yong)透力和破裂電壓降(jiang)低;溶(rong)劑(ji)含量(liang)(liang)偏低,膜(mo)厚下(xia)降(jiang),漆膜(mo)外觀(平滑性(xing))變差(cha)。工(gong)作(zuo)液中溶(rong)劑(ji)含量(liang)(liang)的(de)高低可通過加(jia)入溶(rong)劑(ji)和更換超(chao)濾液來調整。
泳(yong)(yong)(yong)涂(tu)時(shi)間(jian)在(zai)電(dian)(dian)泳(yong)(yong)(yong)槽(cao)中的泳(yong)(yong)(yong)涂(tu)時(shi)間(jian)是指被涂(tu)工(gong)件在(zai)工(gong)作液液面(mian)下形成涂(tu)膜(通電(dian)(dian))的時(shi)間(jian)。這一段時(shi)間(jian)一般限定在(zai)3min左右(you)。隨泳(yong)(yong)(yong)涂(tu)時(shi)間(jian)增長(chang),漆膜厚度增厚。泳(yong)(yong)(yong)涂(tu)時(shi)間(jian)增加或減少(shao)可(ke)以(yi)間(jian)接(jie)地影響漆膜表面(mian)平整和外觀質量(liang)。泳(yong)(yong)(yong)涂(tu)時(shi)間(jian)在(zai)電(dian)(dian)泳(yong)(yong)(yong)涂(tu)裝工(gong)藝管理中起(qi)重要(yao)作用,適當增高泳(yong)(yong)(yong)涂(tu)電(dian)(dian)壓可(ke)縮短泳(yong)(yong)(yong)涂(tu)時(shi)間(jian),在(zai)較低泳(yong)(yong)(yong)涂(tu)電(dian)(dian)壓時(shi)可(ke)增長(chang)泳(yong)(yong)(yong)涂(tu)時(shi)間(jian),以(yi)保證漆膜的厚度。
泳(yong)(yong)涂(tu)(tu)電(dian)(dian)(dian)(dian)(dian)壓(ya)在(zai)電(dian)(dian)(dian)(dian)(dian)泳(yong)(yong)涂(tu)(tu)裝(zhuang)線(xian)中(zhong),泳(yong)(yong)涂(tu)(tu)電(dian)(dian)(dian)(dian)(dian)壓(ya)可(ke)控(kong)(kong)制(zhi)電(dian)(dian)(dian)(dian)(dian)泳(yong)(yong)涂(tu)(tu)裝(zhuang)過程的(de)(de)成膜速度(du)和沉積量,通(tong)常工(gong)作液溫度(du)和泳(yong)(yong)涂(tu)(tu)時(shi)間是(shi)一定(ding)的(de)(de),如果(guo)需要提(ti)高(gao)(gao)或降低膜厚,可(ke)通(tong)過提(ti)高(gao)(gao)或降低電(dian)(dian)(dian)(dian)(dian)壓(ya)來(lai)實現(xian)。在(zai)連續流水線(xian)生(sheng)產(chan)式的(de)(de)電(dian)(dian)(dian)(dian)(dian)泳(yong)(yong)涂(tu)(tu)裝(zhuang)設(she)備上,一般第一通(tong)電(dian)(dian)(dian)(dian)(dian)區段(duan)的(de)(de)電(dian)(dian)(dian)(dian)(dian)壓(ya)控(kong)(kong)制(zhi)在(zai)工(gong)作電(dian)(dian)(dian)(dian)(dian)壓(ya)的(de)(de)下(xia)限(xian)以下(xia),第二區段(duan)的(de)(de)電(dian)(dian)(dian)(dian)(dian)壓(ya)控(kong)(kong)制(zhi)在(zai)工(gong)作電(dian)(dian)(dian)(dian)(dian)壓(ya)甚至略高(gao)(gao)一點。
電(dian)泳(yong)(yong)后回收清洗(xi)被(bei)(bei)涂(tu)物(wu)在電(dian)泳(yong)(yong)后出(chu)(chu)(chu)槽時(shi)表面上附有未泳(yong)(yong)涂(tu)上的工(gong)作(zuo)液(ye),如直(zhi)接(jie)烘(hong)干則(ze)產(chan)生(sheng)斑痕等漆(qi)膜(mo)弊(bi)病,若直(zhi)接(jie)出(chu)(chu)(chu)槽則(ze)產(chan)生(sheng)浪(lang)費。為(wei)消(xiao)除漆(qi)膜(mo)弊(bi)病和回收工(gong)作(zuo)液(ye),電(dian)泳(yong)(yong)涂(tu)裝后必須進行水(shui)洗(xi)。電(dian)泳(yong)(yong)后清洗(xi)可分(fen)兩個(ge)階(jie)段:回收帶出(chu)(chu)(chu)的工(gong)作(zuo)液(ye):在出(chu)(chu)(chu)槽口處用(yong)(yong)超濾液(ye)或去離子水(shui)清洗(xi),洗(xi)液(ye)直(zhi)接(jie)回槽內,最好在被(bei)(bei)涂(tu)物(wu)出(chu)(chu)(chu)槽1min內即進行清洗(xi)。提高漆(qi)膜(mo)的外觀性能:用(yong)(yong)循(xun)環超濾液(ye)沖洗(xi),通(tong)常(chang)洗(xi)23次,最終用(yong)(yong)去離子水(shui)沖洗(xi)。
環氧(yang)封(feng)閉(bi)底漆(qi)為雙組分,在使用前將甲乙組分嚴格按照121比例(li)配好(hao)(hao),混(hun)合攪(jiao)(jiao)拌均勻后(hou)即可使用,涂刷(shua)于(yu)混(hun)凝土構件表面,要(yao)求均勻一致(zhi)(zhi)無(wu)漏刷(shua),26h后(hou)進(jin)行下(xia)道工序。將甲乙組分環氧(yang)瀝青防腐漆(qi)嚴格按照31比例(li)配好(hao)(hao),混(hun)合攪(jiao)(jiao)拌均勻后(hou)涂刷(shua)于(yu)雙組分環氧(yang)封(feng)閉(bi)底漆(qi)的表面上(shang),施工兩道,要(yao)求均勻一致(zhi)(zhi)無(wu)漏刷(shua),漆(qi)膜(mo)厚度達到100120m,1824h后(hou)進(jin)行下(xia)道工序涂刷(shua)。