鉛(qian)(qian)(qian)(qian)是(shi)一種暗(an)灰色的(de)(de)金屬，熔點為(wei)327℃，它有(you)很好的(de)(de)耐(nai)腐(fu)蝕(shi)性(xing)能(neng)，常(chang)用來作(zuo)(zuo)硫(liu)(liu)酸(suan)設(she)備和管(guan)道襯(chen)里。鉛(qian)(qian)(qian)(qian)在(zai)(zai)大氣、淡(dan)水、海(hai)水中(zhong)(zhong)很穩定，鉛(qian)(qian)(qian)(qian)對硫(liu)(liu)酸(suan)、磷酸(suan)、亞硫(liu)(liu)酸(suan)、鉻(ge)酸(suan)和氫氟(fu)酸(suan)等(deng)則(ze)有(you)良好的(de)(de)耐(nai)蝕(shi)性(xing)。鉛(qian)(qian)(qian)(qian)不耐(nai)硝酸(suan)的(de)(de)腐(fu)蝕(shi)，在(zai)(zai)鹽酸(suan)中(zhong)(zhong)也不穩定。鉛(qian)(qian)(qian)(qian)質軟，可塑性(xing)好，管(guan)道工程中(zhong)(zhong)常(chang)用鉛(qian)(qian)(qian)(qian)管(guan)。在(zai)(zai)安(an)裝鑄(zhu)鐵管(guan)承(cheng)插口(kou)時，常(chang)用鉛(qian)(qian)(qian)(qian)做接口(kou)填塞材料，以牌號為(wei)Pb6的(de)(de)鉛(qian)(qian)(qian)(qian)較適宜(yi)。硬鉛(qian)(qian)(qian)(qian)是(shi)鉛(qian)(qian)(qian)(qian)和銻的(de)(de)合金，它的(de)(de)抗腐(fu)蝕(shi)性(xing)略低于(yu)純鉛(qian)(qian)(qian)(qian)，但機械強度較高，常(chang)用于(yu)制造(zao)(zao)耐(nai)酸(suan)設(she)備。鉛(qian)(qian)(qian)(qian)蒸氣有(you)毒，故熔化鉛(qian)(qian)(qian)(qian)時，要(yao)防止燙傷(shang)和鉛(qian)(qian)(qian)(qian)中(zhong)(zhong)毒。在(zai)(zai)化工行業，鉛(qian)(qian)(qian)(qian)主要(yao)用于(yu)處理硫(liu)(liu)酸(suan)的(de)(de)設(she)備上(shang)。Pb4用作(zuo)(zuo)設(she)備內襯(chen)，Pb6用作(zuo)(zuo)管(guan)道接頭，硬鉛(qian)(qian)(qian)(qian)可制造(zao)(zao)硫(liu)(liu)酸(suan)工業用的(de)(de)泵(beng)、閥門、管(guan)道等(deng)。