鉛(qian)(qian)(qian)(qian)是一(yi)種暗灰(hui)色的(de)(de)(de)金(jin)屬，熔(rong)點為327℃，它有(you)很(hen)好(hao)的(de)(de)(de)耐(nai)腐蝕(shi)(shi)性能(neng)，常用(yong)(yong)(yong)(yong)來(lai)作硫酸(suan)設(she)(she)備和(he)(he)管(guan)道襯(chen)里。鉛(qian)(qian)(qian)(qian)在(zai)大氣(qi)、淡(dan)水(shui)、海水(shui)中(zhong)很(hen)穩定(ding)，鉛(qian)(qian)(qian)(qian)對硫酸(suan)、磷酸(suan)、亞(ya)硫酸(suan)、鉻(ge)酸(suan)和(he)(he)氫(qing)氟酸(suan)等(deng)則有(you)良好(hao)的(de)(de)(de)耐(nai)蝕(shi)(shi)性。鉛(qian)(qian)(qian)(qian)不耐(nai)硝酸(suan)的(de)(de)(de)腐蝕(shi)(shi)，在(zai)鹽(yan)酸(suan)中(zhong)也不穩定(ding)。鉛(qian)(qian)(qian)(qian)質軟，可塑(su)性好(hao)，管(guan)道工(gong)程中(zhong)常用(yong)(yong)(yong)(yong)鉛(qian)(qian)(qian)(qian)管(guan)。在(zai)安(an)裝鑄鐵管(guan)承插口(kou)時，常用(yong)(yong)(yong)(yong)鉛(qian)(qian)(qian)(qian)做接口(kou)填塞材(cai)料，以牌號為Pb6的(de)(de)(de)鉛(qian)(qian)(qian)(qian)較適宜。硬鉛(qian)(qian)(qian)(qian)是鉛(qian)(qian)(qian)(qian)和(he)(he)銻的(de)(de)(de)合金(jin)，它的(de)(de)(de)抗腐蝕(shi)(shi)性略低于純鉛(qian)(qian)(qian)(qian)，但機械強度較高(gao)，常用(yong)(yong)(yong)(yong)于制造(zao)耐(nai)酸(suan)設(she)(she)備。鉛(qian)(qian)(qian)(qian)蒸氣(qi)有(you)毒，故熔(rong)化(hua)鉛(qian)(qian)(qian)(qian)時，要防止燙傷和(he)(he)鉛(qian)(qian)(qian)(qian)中(zhong)毒。在(zai)化(hua)工(gong)行業(ye)，鉛(qian)(qian)(qian)(qian)主要用(yong)(yong)(yong)(yong)于處理(li)硫酸(suan)的(de)(de)(de)設(she)(she)備上。Pb4用(yong)(yong)(yong)(yong)作設(she)(she)備內襯(chen)，Pb6用(yong)(yong)(yong)(yong)作管(guan)道接頭，硬鉛(qian)(qian)(qian)(qian)可制造(zao)硫酸(suan)工(gong)業(ye)用(yong)(yong)(yong)(yong)的(de)(de)(de)泵(beng)、閥門(men)、管(guan)道等(deng)。