鉛(qian)(qian)(qian)是(shi)一種暗灰色的(de)(de)(de)(de)金屬，熔點為327℃，它有很(hen)好(hao)(hao)的(de)(de)(de)(de)耐(nai)(nai)腐蝕(shi)性能(neng)，常用(yong)來作硫(liu)酸(suan)(suan)(suan)設(she)備(bei)(bei)和(he)管(guan)道襯里。鉛(qian)(qian)(qian)在大氣(qi)(qi)、淡水(shui)(shui)、海水(shui)(shui)中(zhong)很(hen)穩定(ding)，鉛(qian)(qian)(qian)對硫(liu)酸(suan)(suan)(suan)、磷酸(suan)(suan)(suan)、亞硫(liu)酸(suan)(suan)(suan)、鉻(ge)酸(suan)(suan)(suan)和(he)氫氟酸(suan)(suan)(suan)等則有良(liang)好(hao)(hao)的(de)(de)(de)(de)耐(nai)(nai)蝕(shi)性。鉛(qian)(qian)(qian)不(bu)(bu)耐(nai)(nai)硝酸(suan)(suan)(suan)的(de)(de)(de)(de)腐蝕(shi)，在鹽酸(suan)(suan)(suan)中(zhong)也不(bu)(bu)穩定(ding)。鉛(qian)(qian)(qian)質軟(ruan)，可塑性好(hao)(hao)，管(guan)道工(gong)(gong)(gong)程中(zhong)常用(yong)鉛(qian)(qian)(qian)管(guan)。在安(an)裝鑄鐵管(guan)承插口(kou)時(shi)，常用(yong)鉛(qian)(qian)(qian)做(zuo)接口(kou)填塞材料(liao)，以牌號為Pb6的(de)(de)(de)(de)鉛(qian)(qian)(qian)較(jiao)適宜(yi)。硬鉛(qian)(qian)(qian)是(shi)鉛(qian)(qian)(qian)和(he)銻的(de)(de)(de)(de)合金，它的(de)(de)(de)(de)抗腐蝕(shi)性略低于純鉛(qian)(qian)(qian)，但機(ji)械強度(du)較(jiao)高，常用(yong)于制造耐(nai)(nai)酸(suan)(suan)(suan)設(she)備(bei)(bei)。鉛(qian)(qian)(qian)蒸氣(qi)(qi)有毒(du)，故熔化鉛(qian)(qian)(qian)時(shi)，要防止燙(tang)傷(shang)和(he)鉛(qian)(qian)(qian)中(zhong)毒(du)。在化工(gong)(gong)(gong)行業，鉛(qian)(qian)(qian)主要用(yong)于處理硫(liu)酸(suan)(suan)(suan)的(de)(de)(de)(de)設(she)備(bei)(bei)上。Pb4用(yong)作設(she)備(bei)(bei)內襯，Pb6用(yong)作管(guan)道接頭，硬鉛(qian)(qian)(qian)可制造硫(liu)酸(suan)(suan)(suan)工(gong)(gong)(gong)業用(yong)的(de)(de)(de)(de)泵、閥門、管(guan)道等。