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(guan)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(chu)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(xi)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(guang)

  拋(pao)光(guang)輪或拋(pao)光(guang)帶借助拋(pao)光(guang)劑中(zhong)的(de)磨(mo)料對不銹鋼管表(biao)面(mian)(mian)進行拋(pao)磨(mo)加(jia)工(gong)，促使不銹鋼管面(mian)(mian)達(da)到平(ping)滑拋(pao)光(guang)效(xiao)果。其亮(liang)度與(yu)效(xiao)果則(ze)取決于加(jia)工(gong)方(fang)式的(de)種類。另外機械拋(pao)光(guang)后雖(sui)較美觀但(dan)也會降(jiang)低(di)抗蝕(shi)性，所以(yi)當用在(zai)腐蝕(shi)環境下需再經過鈍化處理，且鋼管表(biao)面(mian)(mian)常有拋(pao)光(guang)材料殘留。

  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(guang)亮退火

  不銹鋼(gang)管(guan)(guan)在制造(zao)過程中，用于潤滑的(de)油脂晶(jing)粒也(ye)會(hui)因加(jia)工而變形(xing)，為(wei)了避免油脂殘留在鋼(gang)管(guan)(guan)中，在退火時利用高溫以氫(qing)(qing)氣充當爐(lu)內氣氛，借(jie)由氫(qing)(qing)氣與(yu)鋼(gang)管(guan)(guan)表面的(de)碳氧結合(he)燃燒，進一步清潔鋼(gang)管(guan)(guan)的(de)表面產生(sheng)亮(liang)(liang)面效(xiao)果(guo)，這種利用純(chun)氫(qing)(qing)氣退火加(jia)熱并(bing)快速冷(leng)卻，以亮(liang)(liang)化(hua)光面的(de)方式(shi)叫光輝退火。雖(sui)然(ran)利用此種方式(shi)來亮(liang)(liang)化(hua)表面可保鋼(gang)管(guan)(guan)充分干凈(jing)無(wu)任何外來污(wu)染。但這種表面的(de)明(ming)亮(liang)(liang)度若與(yu)其他拋光方式(shi)相(xiang)較機械、化(hua)學、電解會(hui)有(you)霧面的(de)感覺。當然(ran)其效(xiao)果(guo)也(ye)與(yu)氫(qing)(qing)氣的(de)含(han)量(liang)與(yu)加(jia)熱的(de)次數有(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(jie)光

 電解拋(pao)光是利用陽極(ji)處理(li)的(de)方式，借由(you)電化(hua)學的(de)原理(li)，適當(dang)地調(diao)整(zheng)電壓、電流(liu)、酸(suan)液(ye)組成(cheng)、以(yi)及拋(pao)光時間，不(bu)但可以(yi)使表面達到明亮、順滑、潔凈(jing)的(de)效果，更可以(yi)提(ti)升表面的(de)抗腐蝕性，所以(yi)是最佳的(de)亮化(hua)表面的(de)方法，當(dang)然其成(cheng)本(ben)和技(ji)術(shu)也(ye)相應的(de)提(ti)高不(bu)少。

 不(bu)(bu)過，因為電解拋(pao)光會(hui)凸顯鋼管(guan)表面(mian)的原始狀態，所以(yi)若鋼管(guan)表面(mian)有嚴重(zhong)刮(gua)傷、孔洞，或是夾渣(zha)、析出物等，皆可能(neng)造(zao)成電解失(shi)敗。其與化學拋(pao)光不(bu)(bu)同之處是，雖然也是在酸性環境(jing)中進行，但鋼管(guan)表面(mian)不(bu)(bu)但不(bu)(bu)會(hui)有任何(he)晶界(jie)腐(fu)蝕(shi)(shi)現象，可經由控(kong)制表面(mian)的氧(yang)化銘膜層厚(hou)度，使鋼管(guan)達到的抗蝕(shi)(shi)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.

這篇文章主要給大(da)家(jia)講解什么是AP級(ji)、MP級(ji)、BA級(ji)、EP級(ji)不銹鋼(gang)管，AP級(ji)、MP級(ji)、BA級(ji)、EP級(ji)不銹鋼(gang)管各種區別和等級(ji)要求(qiu)。希望對大(da)家(jia)有(you)所幫助，有(you)關這方問題，可(ke)以隨(sui)時來電咨詢。