鉛(qian)(qian)是(shi)一種暗灰色的(de)(de)(de)金(jin)屬，熔點為327℃，它(ta)有(you)很好的(de)(de)(de)耐腐蝕性能，常用(yong)來(lai)作硫(liu)酸(suan)(suan)設(she)備(bei)和(he)管(guan)(guan)道(dao)(dao)襯(chen)里(li)。鉛(qian)(qian)在大氣、淡水、海水中很穩(wen)定，鉛(qian)(qian)對硫(liu)酸(suan)(suan)、磷酸(suan)(suan)、亞硫(liu)酸(suan)(suan)、鉻酸(suan)(suan)和(he)氫氟酸(suan)(suan)等則有(you)良(liang)好的(de)(de)(de)耐蝕性。鉛(qian)(qian)不(bu)耐硝(xiao)酸(suan)(suan)的(de)(de)(de)腐蝕，在鹽酸(suan)(suan)中也(ye)不(bu)穩(wen)定。鉛(qian)(qian)質軟，可(ke)塑性好，管(guan)(guan)道(dao)(dao)工(gong)程中常用(yong)鉛(qian)(qian)管(guan)(guan)。在安裝鑄鐵(tie)管(guan)(guan)承插口時，常用(yong)鉛(qian)(qian)做接口填塞材料，以牌號為Pb6的(de)(de)(de)鉛(qian)(qian)較適(shi)宜。硬(ying)鉛(qian)(qian)是(shi)鉛(qian)(qian)和(he)銻的(de)(de)(de)合(he)金(jin)，它(ta)的(de)(de)(de)抗腐蝕性略低于(yu)純鉛(qian)(qian)，但機械強度(du)較高(gao)，常用(yong)于(yu)制造耐酸(suan)(suan)設(she)備(bei)。鉛(qian)(qian)蒸氣有(you)毒(du)，故熔化鉛(qian)(qian)時，要(yao)防(fang)止燙(tang)傷和(he)鉛(qian)(qian)中毒(du)。在化工(gong)行業，鉛(qian)(qian)主要(yao)用(yong)于(yu)處(chu)理硫(liu)酸(suan)(suan)的(de)(de)(de)設(she)備(bei)上(shang)。Pb4用(yong)作設(she)備(bei)內(nei)襯(chen)，Pb6用(yong)作管(guan)(guan)道(dao)(dao)接頭，硬(ying)鉛(qian)(qian)可(ke)制造硫(liu)酸(suan)(suan)工(gong)業用(yong)的(de)(de)(de)泵、閥門、管(guan)(guan)道(dao)(dao)等。