不銹鋼管內外表面(特別如電解拋光、機械拋光后)具有良好的鈍化層，耐腐蝕能力較強。內外表面光潔度高，介質粘附很少有利于耐腐蝕。成都不銹鋼管內(nei)表面光潔(jie)度高液體介質滯留越少，有(you)利于(yu)沖洗，特別在制藥行(xing)業。

　　1、管內(nei)(nei)(nei)表(biao)(biao)面(mian)(mian)(mian)電(dian)(dian)(dian)(dian)(dian)解(jie)拋(pao)(pao)光(guang)(guang)(電(dian)(dian)(dian)(dian)(dian)化(hua)(hua)學拋(pao)(pao)光(guang)(guang))：電(dian)(dian)(dian)(dian)(dian)解(jie)拋(pao)(pao)光(guang)(guang)液(ye)是磷酸、硫酸、鉻(ge)酐、明(ming)膠、重鉻(ge)酸鉀等。不(bu)銹(xiu)鋼管內(nei)(nei)(nei)表(biao)(biao)面(mian)(mian)(mian)在(zai)(zai)陽(yang)(yang)(yang)極(ji)上，拋(pao)(pao)光(guang)(guang)液(ye)在(zai)(zai)和內(nei)(nei)(nei)流(liu)動(dong)通(tong)(tong)以(yi)低電(dian)(dian)(dian)(dian)(dian)壓大電(dian)(dian)(dian)(dian)(dian)流(liu)而(er)進(jin)(jin)(jin)行電(dian)(dian)(dian)(dian)(dian)解(jie)拋(pao)(pao)光(guang)(guang)處(chu)(chu)理(li)。這時(shi)管內(nei)(nei)(nei)表(biao)(biao)面(mian)(mian)(mian)同(tong)時(shi)進(jin)(jin)(jin)行著兩個相互(hu)矛盾的(de)(de)過程(cheng)，即金屬(shu)(shu)表(biao)(biao)面(mian)(mian)(mian)鈍(dun)化(hua)(hua)層(含稠性粘(zhan)膜(mo))生成與溶(rong)解(jie)。由于(yu)(yu)表(biao)(biao)面(mian)(mian)(mian)微觀(guan)的(de)(de)凸(tu)起(qi)部分(fen)(fen)(fen)和凹進(jin)(jin)(jin)部分(fen)(fen)(fen)成膜(mo)進(jin)(jin)(jin)入鈍(dun)化(hua)(hua)的(de)(de)條(tiao)件(jian)是不(bu)同(tong)的(de)(de)，又由于(yu)(yu)陽(yang)(yang)(yang)極(ji)溶(rong)解(jie)。由于(yu)(yu)表(biao)(biao)面(mian)(mian)(mian)微觀(guan)凸(tu)起(qi)部分(fen)(fen)(fen)和凹進(jin)(jin)(jin)部分(fen)(fen)(fen)成膜(mo)進(jin)(jin)(jin)入鈍(dun)化(hua)(hua)的(de)(de)條(tiao)件(jian)是不(bu)同(tong)的(de)(de)，又由于(yu)(yu)陽(yang)(yang)(yang)極(ji)溶(rong)解(jie)，陽(yang)(yang)(yang)極(ji)區金屬(shu)(shu)鹽濃(nong)度(du)(du)(du)不(bu)斷增(zeng)加，在(zai)(zai)表(biao)(biao)面(mian)(mian)(mian)形成一種(zhong)高(gao)電(dian)(dian)(dian)(dian)(dian)阻的(de)(de)稠性粘(zhan)膜(mo)。該膜(mo)在(zai)(zai)凹凸(tu)處(chu)(chu)厚度(du)(du)(du)不(bu)同(tong)導致(zhi)陽(yang)(yang)(yang)極(ji)表(biao)(biao)面(mian)(mian)(mian)電(dian)(dian)(dian)(dian)(dian)流(liu)密度(du)(du)(du)大，尖端放電(dian)(dian)(dian)(dian)(dian)溶(rong)解(jie)速度(du)(du)(du)快，在(zai)(zai)短(duan)時(shi)間(jian)內(nei)(nei)(nei)達到削平突(tu)出的(de)(de)微觀(guan)部分(fen)(fen)(fen)的(de)(de)目(mu)的(de)(de)，能達到很高(gao)的(de)(de)光(guang)(guang)潔(jie)度(du)(du)(du)Ra≤0.2-0.4μm。并在(zai)(zai)這種(zhong)作用下，管內(nei)(nei)(nei)表(biao)(biao)增(zeng)加了鉻(ge)含量，增(zeng)加了金屬(shu)(shu)表(biao)(biao)面(mian)(mian)(mian)鈍(dun)化(hua)(hua)層的(de)(de)耐腐(fu)蝕(shi)能力。如何掌握拋(pao)(pao)光(guang)(guang)的(de)(de)質(zhi)量要與電(dian)(dian)(dian)(dian)(dian)解(jie)液(ye)配(pei)方、濃(nong)度(du)(du)(du)、溫度(du)(du)(du)、通(tong)(tong)電(dian)(dian)(dian)(dian)(dian)時(shi)間(jian)、電(dian)(dian)(dian)(dian)(dian)流(liu)密度(du)(du)(du)、電(dian)(dian)(dian)(dian)(dian)極(ji)狀況、管表(biao)(biao)面(mian)(mian)(mian)處(chu)(chu)理(li)程(cheng)度(du)(du)(du)等有關。技術(shu)掌握不(bu)好(hao)反(fan)而(er)會破壞管表(biao)(biao)面(mian)(mian)(mian)光(guang)(guang)潔(jie)度(du)(du)(du)，電(dian)(dian)(dian)(dian)(dian)解(jie)程(cheng)度(du)(du)(du)過大會出現更多(duo)更大的(de)(de)凹凸(tu)面(mian)(mian)(mian)，甚(shen)至條(tiao)管報廢，真正制作好(hao)質(zhi)量需要一定技術(shu)，費用成本較高(gao)。

　　2、管內表(biao)(biao)面機械(xie)(xie)拋(pao)(pao)(pao)(pao)(pao)(pao)(pao)光(guang)(guang)(guang)：有(you)旋轉與(yu)直線(xian)拋(pao)(pao)(pao)(pao)(pao)(pao)(pao)光(guang)(guang)(guang)。這里以旋轉機械(xie)(xie)拋(pao)(pao)(pao)(pao)(pao)(pao)(pao)光(guang)(guang)(guang)為(wei)例(li)：機械(xie)(xie)拋(pao)(pao)(pao)(pao)(pao)(pao)(pao)光(guang)(guang)(guang)設(she)備較為(wei)簡單(dan)，動(dong)(dong)力(li)與(yu)拋(pao)(pao)(pao)(pao)(pao)(pao)(pao)光(guang)(guang)(guang)盤(pan)、高(gao)級(ji)拋(pao)(pao)(pao)(pao)(pao)(pao)(pao)光(guang)(guang)(guang)設(she)備較為(wei)簡單(dan)，動(dong)(dong)力(li)與(yu)拋(pao)(pao)(pao)(pao)(pao)(pao)(pao)光(guang)(guang)(guang)盤(pan)、高(gao)級(ji)拋(pao)(pao)(pao)(pao)(pao)(pao)(pao)光(guang)(guang)(guang)蠟。采用(yong)逐級(ji)細砂粒作的布盤(pan)與(yu)布盤(pan)在管內外(wai)表(biao)(biao)面上來回多次多道進行拋(pao)(pao)(pao)(pao)(pao)(pao)(pao)光(guang)(guang)(guang)處理，光(guang)(guang)(guang)潔度能達到Ra≤0.2-0.4μm。機械(xie)(xie)拋(pao)(pao)(pao)(pao)(pao)(pao)(pao)光(guang)(guang)(guang)與(yu)電(dian)解拋(pao)(pao)(pao)(pao)(pao)(pao)(pao)光(guang)(guang)(guang)相比較具(ju)有(you)設(she)備簡單(dan)、技術含量低容易掌握，費用(yong)成(cheng)本也低，不會(hui)破(po)壞管而造成(cheng)報廢，因此廣泛(fan)地(di)應(ying)用(yong)。但(dan)表(biao)(biao)面印化層耐腐蝕(shi)能力(li)電(dian)解拋(pao)(pao)(pao)(pao)(pao)(pao)(pao)光(guang)(guang)(guang)要好的多。