鉛(qian)(qian)(qian)是一種暗灰(hui)色(se)的(de)(de)金屬，熔點為327℃，它有很好的(de)(de)耐腐蝕(shi)性(xing)(xing)(xing)能，常用(yong)(yong)(yong)來作硫(liu)(liu)酸(suan)(suan)(suan)設備和(he)管(guan)道襯里。鉛(qian)(qian)(qian)在大(da)氣、淡水、海水中(zhong)很穩(wen)定，鉛(qian)(qian)(qian)對硫(liu)(liu)酸(suan)(suan)(suan)、磷酸(suan)(suan)(suan)、亞硫(liu)(liu)酸(suan)(suan)(suan)、鉻酸(suan)(suan)(suan)和(he)氫氟酸(suan)(suan)(suan)等(deng)則有良好的(de)(de)耐蝕(shi)性(xing)(xing)(xing)。鉛(qian)(qian)(qian)不耐硝酸(suan)(suan)(suan)的(de)(de)腐蝕(shi)，在鹽酸(suan)(suan)(suan)中(zhong)也不穩(wen)定。鉛(qian)(qian)(qian)質軟，可(ke)塑性(xing)(xing)(xing)好，管(guan)道工程中(zhong)常用(yong)(yong)(yong)鉛(qian)(qian)(qian)管(guan)。在安裝鑄鐵管(guan)承插(cha)口時，常用(yong)(yong)(yong)鉛(qian)(qian)(qian)做接口填塞(sai)材料，以牌號為Pb6的(de)(de)鉛(qian)(qian)(qian)較(jiao)適宜。硬(ying)鉛(qian)(qian)(qian)是鉛(qian)(qian)(qian)和(he)銻的(de)(de)合金，它的(de)(de)抗腐蝕(shi)性(xing)(xing)(xing)略(lve)低于純(chun)鉛(qian)(qian)(qian)，但機(ji)械強度較(jiao)高(gao)，常用(yong)(yong)(yong)于制(zhi)(zhi)造耐酸(suan)(suan)(suan)設備。鉛(qian)(qian)(qian)蒸氣有毒，故熔化鉛(qian)(qian)(qian)時，要(yao)(yao)防(fang)止燙傷和(he)鉛(qian)(qian)(qian)中(zhong)毒。在化工行業(ye)，鉛(qian)(qian)(qian)主要(yao)(yao)用(yong)(yong)(yong)于處理硫(liu)(liu)酸(suan)(suan)(suan)的(de)(de)設備上。Pb4用(yong)(yong)(yong)作設備內襯，Pb6用(yong)(yong)(yong)作管(guan)道接頭，硬(ying)鉛(qian)(qian)(qian)可(ke)制(zhi)(zhi)造硫(liu)(liu)酸(suan)(suan)(suan)工業(ye)用(yong)(yong)(yong)的(de)(de)泵、閥門、管(guan)道等(deng)。