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）酸洗處理

  不銹(xiu)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(xie)拋(pao)光

  拋光(guang)輪(lun)或拋光(guang)帶借助拋光(guang)劑中的(de)磨(mo)料對(dui)不銹(xiu)鋼(gang)管表面進行拋磨(mo)加(jia)工，促(cu)使不銹(xiu)鋼(gang)管面達(da)到平滑拋光(guang)效(xiao)果(guo)。其亮度與效(xiao)果(guo)則(ze)取決于加(jia)工方式的(de)種(zhong)類(lei)。另外機械拋光(guang)后雖較美觀但也會降低抗蝕性，所以當用在腐蝕環境下需(xu)再經(jing)過鈍化(hua)處理(li)，且鋼(gang)管表面常有拋光(guang)材(cai)料殘留。

  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）光亮退(tui)火

  不(bu)銹鋼(gang)管(guan)在制造(zao)過程中，用(yong)(yong)于(yu)潤滑的(de)(de)(de)(de)油(you)脂(zhi)晶粒也會(hui)因加(jia)工而變(bian)形，為了避免油(you)脂(zhi)殘留在鋼(gang)管(guan)中，在退火時利(li)(li)用(yong)(yong)高溫(wen)以氫(qing)氣(qi)(qi)(qi)充當爐(lu)內(nei)氣(qi)(qi)(qi)氛，借由氫(qing)氣(qi)(qi)(qi)與(yu)(yu)鋼(gang)管(guan)表面(mian)(mian)(mian)的(de)(de)(de)(de)碳(tan)氧結合(he)燃燒，進一步清潔鋼(gang)管(guan)的(de)(de)(de)(de)表面(mian)(mian)(mian)產生(sheng)亮面(mian)(mian)(mian)效果(guo)，這種利(li)(li)用(yong)(yong)純氫(qing)氣(qi)(qi)(qi)退火加(jia)熱并快速冷卻，以亮化光面(mian)(mian)(mian)的(de)(de)(de)(de)方(fang)式(shi)叫光輝退火。雖然利(li)(li)用(yong)(yong)此(ci)種方(fang)式(shi)來亮化表面(mian)(mian)(mian)可保鋼(gang)管(guan)充分干凈無(wu)任(ren)何外(wai)來污染。但這種表面(mian)(mian)(mian)的(de)(de)(de)(de)明亮度(du)若與(yu)(yu)其他拋光方(fang)式(shi)相較(jiao)機械(xie)、化學、電解會(hui)有(you)(you)霧(wu)面(mian)(mian)(mian)的(de)(de)(de)(de)感覺。當然其效果(guo)也與(yu)(yu)氫(qing)氣(qi)(qi)(qi)的(de)(de)(de)(de)含量與(yu)(yu)加(jia)熱的(de)(de)(de)(de)次(ci)數有(you)(you)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

 電(dian)解拋光(guang)是(shi)利用陽極處理的(de)方(fang)式，借(jie)由電(dian)化(hua)學(xue)的(de)原(yuan)理，適當地調整電(dian)壓、電(dian)流、酸液組成、以及拋光(guang)時間，不(bu)但(dan)可以使表(biao)面(mian)達到明亮、順滑、潔凈的(de)效果，更可以提(ti)(ti)升表(biao)面(mian)的(de)抗(kang)腐蝕性，所以是(shi)最(zui)佳的(de)亮化(hua)表(biao)面(mian)的(de)方(fang)法(fa)，當然其成本和(he)技術也相應的(de)提(ti)(ti)高(gao)不(bu)少。

 不過，因為電解拋光(guang)會凸顯鋼(gang)管(guan)(guan)表(biao)面(mian)(mian)的原始狀態，所以若鋼(gang)管(guan)(guan)表(biao)面(mian)(mian)有(you)嚴重刮傷(shang)、孔洞，或(huo)是夾渣、析出物等，皆(jie)可能造成電解失敗(bai)。其(qi)與化學拋光(guang)不同之(zhi)處是，雖然也是在(zai)酸性環境中(zhong)進(jin)行，但鋼(gang)管(guan)(guan)表(biao)面(mian)(mian)不但不會有(you)任何晶界腐蝕現(xian)象，可經由控(kong)制表(biao)面(mian)(mian)的氧化銘(ming)膜層厚度，使鋼(gang)管(guan)(guan)達到(dao)的抗蝕性。

 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.

這篇文章(zhang)主要(yao)給大家(jia)講解什么(me)是AP級(ji)(ji)、MP級(ji)(ji)、BA級(ji)(ji)、EP級(ji)(ji)不(bu)銹鋼(gang)管(guan)，AP級(ji)(ji)、MP級(ji)(ji)、BA級(ji)(ji)、EP級(ji)(ji)不(bu)銹鋼(gang)管(guan)各種區別和等(deng)級(ji)(ji)要(yao)求。希望對大家(jia)有(you)所幫助，有(you)關這方問(wen)題，可以隨時來電咨詢。