鉛(qian)(qian)(qian)是一種(zhong)暗灰(hui)色(se)的(de)(de)金(jin)屬，熔點為327℃，它有很好(hao)(hao)的(de)(de)耐(nai)腐(fu)蝕性(xing)能，常(chang)用(yong)(yong)來作(zuo)硫酸(suan)(suan)設(she)備(bei)和管道(dao)(dao)(dao)襯(chen)里。鉛(qian)(qian)(qian)在大氣、淡水(shui)、海(hai)水(shui)中(zhong)很穩(wen)定(ding)，鉛(qian)(qian)(qian)對(dui)硫酸(suan)(suan)、磷酸(suan)(suan)、亞硫酸(suan)(suan)、鉻酸(suan)(suan)和氫氟酸(suan)(suan)等則有良(liang)好(hao)(hao)的(de)(de)耐(nai)蝕性(xing)。鉛(qian)(qian)(qian)不(bu)耐(nai)硝酸(suan)(suan)的(de)(de)腐(fu)蝕，在鹽酸(suan)(suan)中(zhong)也不(bu)穩(wen)定(ding)。鉛(qian)(qian)(qian)質軟(ruan)，可塑性(xing)好(hao)(hao)，管道(dao)(dao)(dao)工(gong)程中(zhong)常(chang)用(yong)(yong)鉛(qian)(qian)(qian)管。在安裝鑄鐵(tie)管承插口(kou)(kou)時，常(chang)用(yong)(yong)鉛(qian)(qian)(qian)做接口(kou)(kou)填塞材料(liao)，以牌號為Pb6的(de)(de)鉛(qian)(qian)(qian)較適宜。硬鉛(qian)(qian)(qian)是鉛(qian)(qian)(qian)和銻的(de)(de)合金(jin)，它的(de)(de)抗腐(fu)蝕性(xing)略低(di)于(yu)(yu)(yu)純鉛(qian)(qian)(qian)，但機械強度較高，常(chang)用(yong)(yong)于(yu)(yu)(yu)制造耐(nai)酸(suan)(suan)設(she)備(bei)。鉛(qian)(qian)(qian)蒸氣有毒(du)，故熔化鉛(qian)(qian)(qian)時，要(yao)防(fang)止(zhi)燙(tang)傷(shang)和鉛(qian)(qian)(qian)中(zhong)毒(du)。在化工(gong)行業，鉛(qian)(qian)(qian)主要(yao)用(yong)(yong)于(yu)(yu)(yu)處理硫酸(suan)(suan)的(de)(de)設(she)備(bei)上。Pb4用(yong)(yong)作(zuo)設(she)備(bei)內襯(chen)，Pb6用(yong)(yong)作(zuo)管道(dao)(dao)(dao)接頭(tou)，硬鉛(qian)(qian)(qian)可制造硫酸(suan)(suan)工(gong)業用(yong)(yong)的(de)(de)泵、閥(fa)門、管道(dao)(dao)(dao)等。