鉛(qian)(qian)(qian)(qian)(qian)是(shi)一(yi)種暗(an)灰色的(de)(de)金(jin)(jin)屬(shu)，熔(rong)點為(wei)327℃，它有(you)很好的(de)(de)耐(nai)腐(fu)蝕性(xing)(xing)能，常(chang)用(yong)(yong)(yong)來作(zuo)硫(liu)酸(suan)設(she)備和(he)管(guan)道襯里。鉛(qian)(qian)(qian)(qian)(qian)在大氣、淡水、海水中(zhong)很穩(wen)定，鉛(qian)(qian)(qian)(qian)(qian)對硫(liu)酸(suan)、磷(lin)酸(suan)、亞硫(liu)酸(suan)、鉻(ge)酸(suan)和(he)氫(qing)氟酸(suan)等則有(you)良好的(de)(de)耐(nai)蝕性(xing)(xing)。鉛(qian)(qian)(qian)(qian)(qian)不耐(nai)硝酸(suan)的(de)(de)腐(fu)蝕，在鹽酸(suan)中(zhong)也不穩(wen)定。鉛(qian)(qian)(qian)(qian)(qian)質軟，可塑性(xing)(xing)好，管(guan)道工(gong)(gong)程(cheng)中(zhong)常(chang)用(yong)(yong)(yong)鉛(qian)(qian)(qian)(qian)(qian)管(guan)。在安(an)裝鑄(zhu)鐵管(guan)承(cheng)插口(kou)時，常(chang)用(yong)(yong)(yong)鉛(qian)(qian)(qian)(qian)(qian)做接口(kou)填塞材料，以牌(pai)號為(wei)Pb6的(de)(de)鉛(qian)(qian)(qian)(qian)(qian)較(jiao)適宜。硬鉛(qian)(qian)(qian)(qian)(qian)是(shi)鉛(qian)(qian)(qian)(qian)(qian)和(he)銻的(de)(de)合金(jin)(jin)，它的(de)(de)抗腐(fu)蝕性(xing)(xing)略低(di)于(yu)純鉛(qian)(qian)(qian)(qian)(qian)，但機械強度(du)較(jiao)高(gao)，常(chang)用(yong)(yong)(yong)于(yu)制(zhi)造耐(nai)酸(suan)設(she)備。鉛(qian)(qian)(qian)(qian)(qian)蒸氣有(you)毒(du)(du)，故熔(rong)化(hua)鉛(qian)(qian)(qian)(qian)(qian)時，要防止燙傷和(he)鉛(qian)(qian)(qian)(qian)(qian)中(zhong)毒(du)(du)。在化(hua)工(gong)(gong)行業，鉛(qian)(qian)(qian)(qian)(qian)主(zhu)要用(yong)(yong)(yong)于(yu)處理硫(liu)酸(suan)的(de)(de)設(she)備上。Pb4用(yong)(yong)(yong)作(zuo)設(she)備內(nei)襯，Pb6用(yong)(yong)(yong)作(zuo)管(guan)道接頭，硬鉛(qian)(qian)(qian)(qian)(qian)可制(zhi)造硫(liu)酸(suan)工(gong)(gong)業用(yong)(yong)(yong)的(de)(de)泵(beng)、閥(fa)門、管(guan)道等。