鉛(qian)(qian)(qian)是一種暗(an)灰色的(de)(de)金屬，熔點為327℃，它有很好(hao)的(de)(de)耐(nai)(nai)腐(fu)蝕性(xing)(xing)能，常(chang)用(yong)來作(zuo)硫(liu)酸(suan)(suan)(suan)設(she)(she)備(bei)和(he)管(guan)(guan)道襯(chen)里(li)。鉛(qian)(qian)(qian)在(zai)大氣(qi)、淡水(shui)、海(hai)水(shui)中很穩(wen)定(ding)，鉛(qian)(qian)(qian)對硫(liu)酸(suan)(suan)(suan)、磷酸(suan)(suan)(suan)、亞硫(liu)酸(suan)(suan)(suan)、鉻酸(suan)(suan)(suan)和(he)氫(qing)氟酸(suan)(suan)(suan)等則有良(liang)好(hao)的(de)(de)耐(nai)(nai)蝕性(xing)(xing)。鉛(qian)(qian)(qian)不耐(nai)(nai)硝酸(suan)(suan)(suan)的(de)(de)腐(fu)蝕，在(zai)鹽酸(suan)(suan)(suan)中也不穩(wen)定(ding)。鉛(qian)(qian)(qian)質(zhi)軟(ruan)，可塑性(xing)(xing)好(hao)，管(guan)(guan)道工程中常(chang)用(yong)鉛(qian)(qian)(qian)管(guan)(guan)。在(zai)安裝鑄鐵管(guan)(guan)承(cheng)插口(kou)時，常(chang)用(yong)鉛(qian)(qian)(qian)做接(jie)口(kou)填塞材料，以牌號為Pb6的(de)(de)鉛(qian)(qian)(qian)較適(shi)宜。硬鉛(qian)(qian)(qian)是鉛(qian)(qian)(qian)和(he)銻的(de)(de)合(he)金，它的(de)(de)抗(kang)腐(fu)蝕性(xing)(xing)略低于(yu)純鉛(qian)(qian)(qian)，但(dan)機械強度較高，常(chang)用(yong)于(yu)制(zhi)造耐(nai)(nai)酸(suan)(suan)(suan)設(she)(she)備(bei)。鉛(qian)(qian)(qian)蒸氣(qi)有毒(du)(du)，故熔化鉛(qian)(qian)(qian)時，要(yao)防止燙傷和(he)鉛(qian)(qian)(qian)中毒(du)(du)。在(zai)化工行(xing)業，鉛(qian)(qian)(qian)主(zhu)要(yao)用(yong)于(yu)處理硫(liu)酸(suan)(suan)(suan)的(de)(de)設(she)(she)備(bei)上。Pb4用(yong)作(zuo)設(she)(she)備(bei)內襯(chen)，Pb6用(yong)作(zuo)管(guan)(guan)道接(jie)頭，硬鉛(qian)(qian)(qian)可制(zhi)造硫(liu)酸(suan)(suan)(suan)工業用(yong)的(de)(de)泵、閥(fa)門、管(guan)(guan)道等。