鉛(qian)(qian)(qian)(qian)是一種暗灰(hui)色(se)的(de)金(jin)屬(shu)，熔點為327℃，它(ta)有(you)很好(hao)的(de)耐(nai)腐蝕性能，常(chang)用來作(zuo)硫(liu)酸(suan)(suan)(suan)設備(bei)和(he)管(guan)(guan)道(dao)(dao)襯里(li)。鉛(qian)(qian)(qian)(qian)在大(da)氣、淡水、海水中(zhong)(zhong)很穩(wen)定，鉛(qian)(qian)(qian)(qian)對硫(liu)酸(suan)(suan)(suan)、磷酸(suan)(suan)(suan)、亞硫(liu)酸(suan)(suan)(suan)、鉻(ge)酸(suan)(suan)(suan)和(he)氫氟酸(suan)(suan)(suan)等則有(you)良好(hao)的(de)耐(nai)蝕性。鉛(qian)(qian)(qian)(qian)不耐(nai)硝酸(suan)(suan)(suan)的(de)腐蝕，在鹽酸(suan)(suan)(suan)中(zhong)(zhong)也不穩(wen)定。鉛(qian)(qian)(qian)(qian)質軟(ruan)，可塑性好(hao)，管(guan)(guan)道(dao)(dao)工程(cheng)中(zhong)(zhong)常(chang)用鉛(qian)(qian)(qian)(qian)管(guan)(guan)。在安裝鑄鐵管(guan)(guan)承插口時，常(chang)用鉛(qian)(qian)(qian)(qian)做接(jie)口填(tian)塞材料，以牌號為Pb6的(de)鉛(qian)(qian)(qian)(qian)較適宜。硬鉛(qian)(qian)(qian)(qian)是鉛(qian)(qian)(qian)(qian)和(he)銻的(de)合金(jin)，它(ta)的(de)抗腐蝕性略低于(yu)(yu)純鉛(qian)(qian)(qian)(qian)，但機械強度較高，常(chang)用于(yu)(yu)制造耐(nai)酸(suan)(suan)(suan)設備(bei)。鉛(qian)(qian)(qian)(qian)蒸(zheng)氣有(you)毒(du)，故熔化(hua)鉛(qian)(qian)(qian)(qian)時，要(yao)(yao)防止(zhi)燙傷和(he)鉛(qian)(qian)(qian)(qian)中(zhong)(zhong)毒(du)。在化(hua)工行業，鉛(qian)(qian)(qian)(qian)主要(yao)(yao)用于(yu)(yu)處理(li)硫(liu)酸(suan)(suan)(suan)的(de)設備(bei)上。Pb4用作(zuo)設備(bei)內襯，Pb6用作(zuo)管(guan)(guan)道(dao)(dao)接(jie)頭，硬鉛(qian)(qian)(qian)(qian)可制造硫(liu)酸(suan)(suan)(suan)工業用的(de)泵、閥門、管(guan)(guan)道(dao)(dao)等。