​选用热镀锌工艺原因

       从(cong)健康上(shang)讲，热(re)(re)(re)(re)(re)(re)热(re)(re)(re)(re)(re)(re)浸(jin)(jin)(jin)(jin)锌(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)的(de)水(shui)有(you)机(ji)废气具体是(shi)(shi)(shi)酸(suan)(suan)处(chu)理(li)铝件(jian)(jian)(jian)(jian)的(de)废酸(suan)(suan).热(re)(re)(re)(re)(re)(re)镀(du)(du)(du)(du)(du)(du)(du)锌(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)污染物(wu)(wu)排放(fang)更少一(yi)(yi)(yi)些.冷(leng)镀(du)(du)(du)(du)(du)(du)(du)锌(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)的(de)污染物(wu)(wu)排放(fang)种类和数量都(dou)大(da)(da)大(da)(da)超过(guo)热(re)(re)(re)(re)(re)(re)镀(du)(du)(du)(du)(du)(du)(du)锌(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin).冷(leng)镀(du)(du)(du)(du)(du)(du)(du)锌(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)的(de)污染物(wu)(wu)主要(yao)包括酸(suan)(suan)洗(xi)工(gong)(gong)(gong)(gong)(gong)件(jian)(jian)(jian)(jian)的(de)废酸(suan)(suan)、电(dian)(dian)(dian)镀(du)(du)(du)(du)(du)(du)(du)废液、废钝化液等(deng).热(re)(re)(re)(re)(re)(re)镀(du)(du)(du)(du)(du)(du)(du)锌(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)是(shi)(shi)(shi)化学处(chu)理(li),属(shu)(shu)于电(dian)(dian)(dian)化学反应.冷(leng)镀(du)(du)(du)(du)(du)(du)(du)锌(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)是(shi)(shi)(shi)物(wu)(wu)理(li)处(chu)理(li),只是(shi)(shi)(shi)在(zai)(zai)表面(mian)刷一(yi)(yi)(yi)层(ceng)(ceng)锌(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin),所(suo)以锌(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)层(ceng)(ceng)易(yi)脱落.建筑施工(gong)(gong)(gong)(gong)(gong)中(zhong)多采用热(re)(re)(re)(re)(re)(re)镀(du)(du)(du)(du)(du)(du)(du)锌(xin)ꦜ(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin).连(lian)续热(re)(re)(re)(re)(re)(re)镀(du)(du)(du)(du)(du)(du)(du)锌(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)工(gong)(gong)(gong)(gong)(gong)艺：钢材→加(jia)热(re)(re)(re)(re)(re)(re)→冷(leng)却至镀(du)(du)(du)(du)(du)(du)(du)锌(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)温(wen)度(du)→镀(du)(du)(du)(du)(du)(du)(du)锌(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)→冷(leng)却冷(leng)镀(du)(du)(du)(du)(du)(du)(du)锌(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)就是(shi)(shi)(shi)电(dian)(dian)(dian)镀(du)(du)(du)(du)(du)(du)(du)锌(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin),只有(you)10－50g/m2,其本身的(de)耐腐蚀性比热(re)(re)(re)(re)(re)(re)浸(jin)(jin)(jin)(jin)镀(du)(du)(du)(du)(du)(du)(du)锌(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)相差很多.采用电(dian)(dian)(dian)镀(du)(du)(du)(du)(du)(du)(du)锌(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)的(de)价(jia)格相对(dui)便宜(yi)一(yi)(yi)(yi)些.热(re)(re)(re)(re)(re)(re)镀(du)(du)(du)(du)(du)(du)(du)锌(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)是(shi)(shi)(shi)钢体在(zai)(zai)热(re)(re)(re)(re)(re)(re)浸(jin)(jin)(jin)(jin)的(de)条件(jian)(jian)(jian)(jian)下对(dui)表面(mian)镀(du)(du)(du)(du)(du)(du)(du)锌(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin),它的(de)附着(zhe)力很强,不容(rong)易(yi)脱落,热(re)(re)(re)(re)(re)(re)镀(du)(du)(du)(du)(du)(du)(du)锌(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)管虽然也出现锈蚀的(de)现象,但(dan)在(zai)(zai)很长(zhang)的(de)周期可以满足(zu)技术、卫生要(yao)求.热(re)(re)(re)(re)(re)(re)镀(du)(du)(du)(du)(du)(du)(du)锌(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)又(you)称(cheng)为(wei)热(re)(re)(re)(re)(re)(re)浸(jin)(jin)(jin)(jin)镀(du)(du)(du)(du)(du)(du)(du)锌(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin),他(ta)是(shi)(shi)(shi)在(zai)(zai)高温(wen)下把(ba)(ba)锌(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)锭(ding)融化,在(zai)(zai)放(fang)入一(yi)(yi)(yi)些辅助材料,然后(hou)把(ba)(ba)金(jin)属(shu)(shu)结构件(jian)(jian)(jian)(jian)浸(jin)(jin)(jin)(jin)入镀(du)(du)(du)(du)(du)(du)(du)锌(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)槽中(zhong),使金(jin)属(shu)(shu)构件(jian)(jian)(jian)(jian)上(shang)附着(zhe)一(yi)(yi)(yi)层(ceng)(ceng)锌(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)层(ceng)(ceng).热(re)(re)(re)(re)(re)(re)镀(du)(du)(du)(du)(du)(du)(du)锌(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)的(de)优点在(zai)(zai)于他(ta)的(de)防(fang)腐能力强,镀(du)(du)(du)(du)(du)(du)(du)锌(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)层(ceng)(ceng)的(de)附着(zhe)力和硬度(du)较好.“冷(leng)镀(du)(du)(du)(du)(du)(du)(du)”即(ji)“电(dian)(dian)(dian)镀(du)(du)(du)(du)(du)(du)(du)”,即(ji)把(ba)(ba)锌(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)盐溶液通过(guo)电(dian)(dian)(dian)解(jie),给镀(du)(du)(du)(du)(du)(du)(du)件(jian)(jian)(jian)(jian)上(shang)镀(du)(du)(du)(du)(du)(du)(du)层(ceng)(ceng),一(yi)(yi)(yi)般来说(shuo)不用加(jia)热(re)(re)(re)(re)(re)(re),上(shang)锌(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)量很少,遇到潮湿环(huan)境很容(rong)易(yi)脱落.工(gong)(gong)(gong)(gong)(gong)艺的(de)区别是(shi)(shi)(shi)：热(re)(re)(re)(re)(re)(re)镀(du)(du)(du)(du)(du)(du)(du)锌(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)是(shi)(shi)(shi)将(jiang)工(gong)(gong)(gong)(gong)(gong)件(jian)(jian)(jian)(jian)除油(you)、酸(suan)(suan)洗(xi)、浸(jin)(jin)(jin)(jin)药、烘干后(hou)浸(jin)(jin)(jin)(jin)入溶化的(de)锌(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)液里一(yi)(yi)(yi)定(ding)时间,提出来即(ji)可.冷(leng)镀(du)(du)(du)(du)(du)(du)(du)锌(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)也叫电(dian)(dian)(dian)镀(du)(du)(du)(du)(du)(du)(du)锌(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin),是(shi)(shi)(shi)利用电(dian)(dian)(dian)解(jie)设(she)备将(jiang)工(gong)(gong)(gong)(gong)(gong)件(jian)(jian)(jian)(jian)经过(guo)除油(you)、酸(suan)(suan)洗(xi)后(hou)放(fang)入成(cheng)分为(wei)锌(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)盐的(de)溶液中(zhong),并(bing)连(lian)接电(dian)(🔯dian)(dian)解(jie)设(she)备的(de)负极(ji)；在(zai)(zai)工(gong)(gong)(gong)(gong)(gong)件(jian)(jian)(jian)(jian)的(de)对(dui)面(mian)放(fang)置锌(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)板(ban)连(lian)接在(zai)(zai)电(dian)(dian)(dian)解(jie)设(she)备的(de)正极(ji) ,接通电(dian)(dian)(dian)源,利用电(dian)(dian)(dian)流(liu)从(cong)正极(ji)向负极(ji)的(de)定(ding)向移动,就会在(zai)(zai)工(gong)(gong)(gong)(gong)(gong)件(jian)(jian)(jian)(jian)上(shang)沉积一(yi)(yi)(yi)层(ceng)(ceng)锌(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)。