浙江至德鋼業有限公司銷售人員認為，影響不銹鋼管價格的因素除了品牌、材質和生產工藝以外，最重要因素是不銹鋼(gang)管表面處理方法。為進一步改善管道材料特性，對管道內外表面進行處理 般有四種方法：酸洗鈍化（AP）、機械拋光（MP）、光亮退火（BA）和電解拋光（EP）處理工藝。試驗資料和實踐都證明，通過表面處理后，管道材料的粗糙度減小，表面吸附性減弱。那么AP、MP、BP、EP級不銹鋼管的區別在哪？

AP（Acid Pickling）酸(suan)洗處理

  不銹鋼的耐腐蝕能力主要來源于其內含的鉻元素與氧氣發生反應后在其表面形成一層致密的防護層。而酸洗的作用就是讓其提前發生這種反應，以提高不銹鋼管的耐腐蝕能力，酸洗過程中會去除管材表面所附著的油污及其他在生產中所沾染的其他物質。管道內外表面較粗糙易有懸浮雜質附著。

MP（Mechanical polishing）機械拋光

  拋(pao)光(guang)輪(lun)或拋(pao)光(guang)帶借助拋(pao)光(guang)劑(ji)中的磨料對不(bu)(bu)銹鋼管表面進行拋(pao)磨加(jia)工(gong)(gong)，促使不(bu)(bu)銹鋼管面達(da)到平滑拋(pao)光(guang)效果。其亮度與效果則取決于(yu)加(jia)工(gong)(gong)方(fang)式的種類(lei)。另外機械(xie)拋(pao)光(guang)后雖(sui)較美觀但也會降低抗蝕性，所(suo)以(yi)當用(yong)在腐蝕環境下需再經過鈍化處理，且鋼管表面常有(you)拋(pao)光(guang)材料殘(can)留。

  The polishing wheel or polishing belt uses the abrasive in the polishing agent to polish the surface of the stainless steel tube to promote the smooth polishing effect of the stainless steel tube surface.Its brightness and effect depend on the type of processing method.In addition，although it is more beautiful after mechanical polishing，it will also reduce the corrosion resistance，so when it is used in a corrosive environment，it needs to be passivated again，and there are often polishing materials left on the surface of the steel pipe.

BA（Bright Annealing）光亮(liang)退火

  不(bu)銹(xiu)鋼(gang)管(guan)在(zai)制造(zao)過程中(zhong)，用(yong)(yong)于潤滑的(de)(de)油脂晶粒也(ye)會因加(jia)(jia)工而變(bian)形，為了避(bi)免油脂殘留在(zai)鋼(gang)管(guan)中(zhong)，在(zai)退火時利用(yong)(yong)高溫以氫氣(qi)充當(dang)(dang)爐內氣(qi)氛，借由氫氣(qi)與(yu)鋼(gang)管(guan)表(biao)面(mian)的(de)(de)碳氧結合燃燒，進一步清潔鋼(gang)管(guan)的(de)(de)表(biao)面(mian)產生(sheng)亮面(mian)效(xiao)果，這(zhe)種(zhong)利用(yong)(yong)純氫氣(qi)退火加(jia)(jia)熱并快速冷卻，以亮化(hua)光面(mian)的(de)(de)方式(shi)叫光輝(hui)退火。雖然利用(yong)(yong)此種(zhong)方式(shi)來亮化(hua)表(biao)面(mian)可(ke)保鋼(gang)管(guan)充分(fen)干凈無(wu)任何外來污染。但(dan)這(zhe)種(zhong)表(biao)面(mian)的(de)(de)明(ming)亮度若與(yu)其他拋光方式(shi)相較機(ji)械、化(hua)學、電解會有霧面(mian)的(de)(de)感覺。當(dang)(dang)然其效(xiao)果也(ye)與(yu)氫氣(qi)的(de)(de)含量與(yu)加(jia)(jia)熱的(de)(de)次數有關。

  During the manufacturing process of the steel pipe，the grease grains used for lubrication will also be deformed due to processing.In order to avoid the grease remaining in the steel pipe，argon gas is used as the furnace atmosphere at high temperature during annealing.Oxygen combined combustion further cleans the surface of the steel pipe to produce a bright surface effect.This kind of annealing and heating with pure argon gas is called bright annealing in the way of brightening the surface.Although using this method to brighten the surface can keep the steel pipe sufficiently clean without any external pollution.However，if the brightness of this surface is mechanical，chemical，or electrolytic compared to other polishing methods，it will feel matte.Of course，the effect is also related to the content of argon gas and the number of heating times.

EP（Electro Polishing）電解光(guang)

 電解拋(pao)光是(shi)(shi)利用陽極(ji)處理(li)的(de)方式，借由(you)電化學的(de)原理(li)，適當(dang)地調整電壓、電流、酸液組成、以(yi)(yi)及拋(pao)光時間，不但可(ke)以(yi)(yi)使表(biao)(biao)面達到明亮、順滑、潔凈的(de)效(xiao)果，更可(ke)以(yi)(yi)提(ti)升表(biao)(biao)面的(de)抗腐蝕性，所以(yi)(yi)是(shi)(shi)最佳的(de)亮化表(biao)(biao)面的(de)方法，當(dang)然其成本和技術也相應的(de)提(ti)高不少。

 不(bu)(bu)過，因(yin)為電解(jie)拋(pao)光(guang)會(hui)凸顯(xian)鋼(gang)管表面(mian)(mian)的(de)(de)(de)原始狀態，所(suo)以若鋼(gang)管表面(mian)(mian)有嚴重刮(gua)傷、孔(kong)洞，或是(shi)夾渣(zha)、析(xi)出物等，皆可能造成電解(jie)失(shi)敗(bai)。其與(yu)化(hua)學拋(pao)光(guang)不(bu)(bu)同之處(chu)是(shi)，雖然也(ye)是(shi)在酸性(xing)環境中(zhong)進行，但鋼(gang)管表面(mian)(mian)不(bu)(bu)但不(bu)(bu)會(hui)有任何晶界腐蝕(shi)現(xian)象，可經(jing)由控制表面(mian)(mian)的(de)(de)(de)氧化(hua)銘膜層厚度，使鋼(gang)管達到的(de)(de)(de)抗蝕(shi)性(xing)。

 However，because the electrolytic polishing will highlight the original state of the surface of the steel pipe，if the surface of the steel pipe has serious scratches，holes，or slag，precipitates，etc.，it may cause electrolytic failure.

 The difference between it and chemical polishing is that although it is also carried out in an acidic environment，the surface of the steel pipe will not have any grain boundary corrosion，and the corrosion resistance of the steel pipe can be achieved by controlling the thickness of the chromium oxide film on the surface.

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