鉛(qian)(qian)(qian)是一種暗灰色的(de)(de)金屬，熔點為327℃，它(ta)有(you)很(hen)好(hao)的(de)(de)耐腐蝕(shi)性(xing)能，常(chang)用(yong)來作硫(liu)酸(suan)(suan)(suan)(suan)設備(bei)(bei)和管(guan)(guan)道襯里。鉛(qian)(qian)(qian)在(zai)大氣(qi)(qi)、淡水、海水中(zhong)很(hen)穩(wen)定，鉛(qian)(qian)(qian)對硫(liu)酸(suan)(suan)(suan)(suan)、磷酸(suan)(suan)(suan)(suan)、亞(ya)硫(liu)酸(suan)(suan)(suan)(suan)、鉻(ge)酸(suan)(suan)(suan)(suan)和氫氟(fu)酸(suan)(suan)(suan)(suan)等則有(you)良好(hao)的(de)(de)耐蝕(shi)性(xing)。鉛(qian)(qian)(qian)不耐硝酸(suan)(suan)(suan)(suan)的(de)(de)腐蝕(shi)，在(zai)鹽酸(suan)(suan)(suan)(suan)中(zhong)也不穩(wen)定。鉛(qian)(qian)(qian)質(zhi)軟(ruan)，可塑性(xing)好(hao)，管(guan)(guan)道工程(cheng)中(zhong)常(chang)用(yong)鉛(qian)(qian)(qian)管(guan)(guan)。在(zai)安(an)裝(zhuang)鑄鐵管(guan)(guan)承插口時，常(chang)用(yong)鉛(qian)(qian)(qian)做接(jie)口填塞材料，以牌號為Pb6的(de)(de)鉛(qian)(qian)(qian)較適宜。硬(ying)(ying)鉛(qian)(qian)(qian)是鉛(qian)(qian)(qian)和銻(ti)的(de)(de)合金，它(ta)的(de)(de)抗腐蝕(shi)性(xing)略低于(yu)純鉛(qian)(qian)(qian)，但機械強度較高(gao)，常(chang)用(yong)于(yu)制造耐酸(suan)(suan)(suan)(suan)設備(bei)(bei)。鉛(qian)(qian)(qian)蒸氣(qi)(qi)有(you)毒(du)，故熔化鉛(qian)(qian)(qian)時，要(yao)防止燙(tang)傷(shang)和鉛(qian)(qian)(qian)中(zhong)毒(du)。在(zai)化工行業(ye)(ye)，鉛(qian)(qian)(qian)主要(yao)用(yong)于(yu)處理硫(liu)酸(suan)(suan)(suan)(suan)的(de)(de)設備(bei)(bei)上。Pb4用(yong)作設備(bei)(bei)內(nei)襯，Pb6用(yong)作管(guan)(guan)道接(jie)頭(tou)，硬(ying)(ying)鉛(qian)(qian)(qian)可制造硫(liu)酸(suan)(suan)(suan)(suan)工業(ye)(ye)用(yong)的(de)(de)泵、閥門、管(guan)(guan)道等。