鉛(qian)(qian)(qian)是一種暗灰色的(de)金(jin)屬(shu)，熔(rong)點(dian)為(wei)327℃，它有(you)很好的(de)耐(nai)腐(fu)(fu)蝕(shi)性(xing)能，常(chang)用(yong)(yong)來作(zuo)硫(liu)酸設備和(he)管(guan)道(dao)(dao)襯里。鉛(qian)(qian)(qian)在(zai)大(da)氣(qi)、淡水、海水中很穩(wen)定，鉛(qian)(qian)(qian)對硫(liu)酸、磷酸、亞硫(liu)酸、鉻酸和(he)氫氟酸等則有(you)良好的(de)耐(nai)蝕(shi)性(xing)。鉛(qian)(qian)(qian)不耐(nai)硝酸的(de)腐(fu)(fu)蝕(shi)，在(zai)鹽酸中也不穩(wen)定。鉛(qian)(qian)(qian)質軟，可(ke)塑性(xing)好，管(guan)道(dao)(dao)工程中常(chang)用(yong)(yong)鉛(qian)(qian)(qian)管(guan)。在(zai)安裝鑄(zhu)鐵管(guan)承插口時，常(chang)用(yong)(yong)鉛(qian)(qian)(qian)做接口填塞材(cai)料，以(yi)牌號為(wei)Pb6的(de)鉛(qian)(qian)(qian)較適宜。硬鉛(qian)(qian)(qian)是鉛(qian)(qian)(qian)和(he)銻(ti)的(de)合金(jin)，它的(de)抗腐(fu)(fu)蝕(shi)性(xing)略低于(yu)純鉛(qian)(qian)(qian)，但機(ji)械強度(du)較高(gao)，常(chang)用(yong)(yong)于(yu)制造耐(nai)酸設備。鉛(qian)(qian)(qian)蒸氣(qi)有(you)毒(du)，故熔(rong)化鉛(qian)(qian)(qian)時，要(yao)防止燙(tang)傷和(he)鉛(qian)(qian)(qian)中毒(du)。在(zai)化工行業(ye)，鉛(qian)(qian)(qian)主要(yao)用(yong)(yong)于(yu)處理硫(liu)酸的(de)設備上(shang)。Pb4用(yong)(yong)作(zuo)設備內襯，Pb6用(yong)(yong)作(zuo)管(guan)道(dao)(dao)接頭，硬鉛(qian)(qian)(qian)可(ke)制造硫(liu)酸工業(ye)用(yong)(yong)的(de)泵、閥門(men)、管(guan)道(dao)(dao)等。