鋼(gang)(gang)桶不(bu)足之處。主要是：化學穩(wen)定(ding)性差(cha)，閉口鋼(gang)(gang)桶報(bao)價，耐蝕(shi)性不(bu)如塑料(liao)和(he)玻璃，尤(you)其是普(pu)通鋼(gang)(gang)材容易銹蝕(shi)。因(yin)此鋼(gang)(gang)桶多須(xu)在表(biao)面再覆(fu)蓋一層防銹物質(zhi)，以防止(zhi)來自外界和(he)被(bei)包(bao)裝物的(de)腐蝕(shi)破壞作用，同(tong)時(shi)也(ye)要防止(zhi)鋼(gang)(gang)材中的(de)有害(hai)物質(zhi)對商(shang)品的(de)污(wu)染(ran)，例如鋼(gang)(gang)材中不(bu)同(tong)程度地含(han)有重金(jin)屬商(shang)子(zi)(zi)Pb、Sn等，這(zhe)些重金(jin)屬離(li)子(zi)(zi)能夠與(yu)商(shang)品作用，208l閉口鋼(gang)(gang)桶，特別是食品，不(bu)僅污(wu)染(ran)食品，而且(qie)這(zhe)些重金(jin)屬離(li)子(zi)(zi)對人體危(wei)害(hai)較大。

鋼桶用鋼板的分類

鋼(gang)(gang)(gang)(gang)桶用鋼(gang)(gang)(gang)(gang)板(ban)(ban)(ban)按(an)(an)厚度分(fen)(fen)類：薄(bo)板(ban)(ban)(ban)、中(zhong)板(ban)(ban)(ban)、厚板(ban)(ban)(ban)、特厚板(ban)(ban)(ban)。按(an)(an)生(sheng)產方法(fa)分(fen)(fen)類：熱(re)軋(ya)鋼(gang)(gang)(gang)(gang)板(ban)(ban)(ban)、冷軋(ya)鋼(gang)(gang)(gang)(gang)板(ban)(ban)(ban)。按(an)(an)表(biao)面(mian)特征(zheng)分(fen)(fen)類：鍍(du)(du)鋅(xin)板(ban)(ban)(ban)（熱(re)鍍(du)(du)鋅(xin)板(ban)(ban)(ban)、電鍍(du)(du)鋅(xin)板(ban)(ban)(ban)）、鍍(du)(du)錫板(ban)(ban)(ban)、復合鋼(gang)(gang)(gang)(gang)板(ban)(ban)(ban)、彩色涂層鋼(gang)(gang)(gang)(gang)板(ban)(ban)(ban)。 按(an)(an)用途分(fen)(fen)類：橋(qiao)梁(liang)鋼(gang)(gang)(gang)(gang)板(ban)(ban)(ban)、鍋爐鋼(gang)(gang)(gang)(gang)板(ban)(ban)(ban)、造(zao)船鋼(gang)(gang)(gang)(gang)板(ban)(ban)(ban)、裝甲鋼(gang)(gang)(gang)(gang)板(ban)(ban)(ban)、汽車鋼(gang)(gang)(gang)(gang)板(ban)(ban)(ban)、屋面(mian)鋼(gang)(gang)(gang)(gang)板(ban)(ban)(ban)、結(jie)構鋼(gang)(gang)(gang)(gang)板(ban)(ban)(ban)、電工鋼(gang)(gang)(gang)(gang)板(ban)(ban)(ban)（硅鋼(gang)(gang)(gang)(gang)片）、彈簧(huang)鋼(gang)(gang)(gang)(gang)板(ban)(ban)(ban)，閉(bi)口防腐鋼(gang)(gang)(gang)(gang)桶，其他。。。。。。。。。。。。。。。

鋼(gang)桶表(biao)面的除銹(xiu)方(fang)法(fa)分(fen)為化學方(fang)法(fa)和(he)機械(xie)法(fa)兩大(da)類。

化(hua)學法除銹(xiu)是(shi)利用化(hua)學瓜(gua)或(huo)(huo)電化(hua)學瓜(gua)從鋼(gang)桶(tong)(tong)表面(mian)溶解掉一般銹(xiu)跡(ji)、氧化(hua)皮及各(ge)種腐(fu)蝕產物而不影響(xiang)鋼(gang)桶(tong)(tong)基體金屬。常(chang)用的(de)化(hua)學除銹(xiu)方法是(shi)酸洗，淮安閉(bi)口(kou)鋼(gang)桶(tong)(tong)，即利用有機(ji)酸或(huo)(huo)無機(ji)酸使鋼(gang)桶(tong)(tong)表面(mian)的(de)氧化(hua)物 和黃銹(xiu)從鋼(gang)桶(tong)(tong)表面(mian)折出(chu)。

機械(xie)除(chu)銹(xiu)是(shi)(shi)利用(yong)(yong)(yong)摩(mo)擦、錘擊、沖刷等(deng)機械(xie)作用(yong)(yong)(yong)力(li)(li)，使(shi)磨(mo)粒在鋼桶(tong)表面除(chu)去銹(xiu)跡、高溫氧化皮等(deng)污(wu)物(wu)。鋼桶(tong)企(qi)業常用(yong)(yong)(yong)的(de)機械(xie)除(chu)銹(xiu) 方法(fa)是(shi)(shi)手(shou)工(gong)(gong)打磨(mo)才機械(xie)打磨(mo)埤工(gong)(gong)除(chu)銹(xiu)是(shi)(shi)使(shi)用(yong)(yong)(yong)簡(jian)單工(gong)(gong)具用(yong)(yong)(yong)人力(li)(li)進(jin) 行除(chu)銹(xiu)，其方法(fa)簡(jian)單易行，但勞動強(qiang)度大，生產效(xiao)率低且(qie)除(chu)銹(xiu)質量差(cha)，一(yi)般只能除(chu)去疏松的(de)或較輕的(de)鐵銹(xiu)。