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(bu)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(chu)理

  不(bu)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

  拋光輪或拋光帶借助拋光劑中(zhong)的磨(mo)料(liao)對不(bu)銹(xiu)鋼管表面進(jin)行拋磨(mo)加工，促使不(bu)銹(xiu)鋼管面達(da)到(dao)平滑拋光效果。其亮度與效果則取決于加工方式的種(zhong)類。另外(wai)機械拋光后雖較美觀但也會降低抗蝕(shi)性(xing)，所以當用在(zai)腐蝕(shi)環(huan)境(jing)下需再經過鈍化(hua)處理，且(qie)鋼管表面常有拋光材料(liao)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）光亮退火

  不銹鋼(gang)管在制造過程中(zhong)，用(yong)于潤滑的(de)油(you)脂(zhi)(zhi)晶粒也會(hui)因加工(gong)而(er)變形，為了避免(mian)油(you)脂(zhi)(zhi)殘留在鋼(gang)管中(zhong)，在退(tui)火時利(li)用(yong)高溫以氫氣(qi)(qi)(qi)充(chong)(chong)當爐(lu)內氣(qi)(qi)(qi)氛，借由氫氣(qi)(qi)(qi)與(yu)鋼(gang)管表面(mian)(mian)的(de)碳氧結合燃(ran)燒，進一步(bu)清潔鋼(gang)管的(de)表面(mian)(mian)產生亮(liang)面(mian)(mian)效果(guo)，這種利(li)用(yong)純氫氣(qi)(qi)(qi)退(tui)火加熱并(bing)快速冷卻，以亮(liang)化(hua)(hua)光(guang)面(mian)(mian)的(de)方式叫光(guang)輝退(tui)火。雖然(ran)利(li)用(yong)此(ci)種方式來亮(liang)化(hua)(hua)表面(mian)(mian)可保鋼(gang)管充(chong)(chong)分干凈無任(ren)何外(wai)來污染。但這種表面(mian)(mian)的(de)明亮(liang)度若與(yu)其(qi)(qi)他拋光(guang)方式相較(jiao)機(ji)械、化(hua)(hua)學(xue)、電解會(hui)有霧面(mian)(mian)的(de)感覺。當然(ran)其(qi)(qi)效果(guo)也與(yu)氫氣(qi)(qi)(qi)的(de)含(han)量與(yu)加熱的(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(dian)解光

 電解拋光(guang)是利用陽極處理的方式，借由電化學(xue)的原理，適(shi)當(dang)地調整電壓(ya)、電流、酸液(ye)組(zu)成、以及拋光(guang)時間，不(bu)但可以使表面(mian)(mian)(mian)達到(dao)明亮、順(shun)滑、潔凈的效果，更可以提(ti)升表面(mian)(mian)(mian)的抗腐蝕性，所以是最(zui)佳的亮化表面(mian)(mian)(mian)的方法(fa)，當(dang)然其成本和技(ji)術也相應的提(ti)高(gao)不(bu)少(shao)。

 不(bu)過，因為電(dian)解拋(pao)光(guang)會(hui)凸顯鋼管表(biao)面的(de)原始狀(zhuang)態，所以若鋼管表(biao)面有嚴重刮傷(shang)、孔(kong)洞，或是(shi)夾渣、析(xi)出物等，皆(jie)可能(neng)造成電(dian)解失敗。其與化學拋(pao)光(guang)不(bu)同(tong)之處是(shi)，雖(sui)然也(ye)是(shi)在酸性環境中(zhong)進行，但(dan)(dan)鋼管表(biao)面不(bu)但(dan)(dan)不(bu)會(hui)有任何晶界腐蝕現象，可經由控制表(biao)面的(de)氧化銘膜層(ceng)厚度，使鋼管達到(dao)的(de)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(wen)章(zhang)主(zhu)要給大家講解什么是AP級(ji)、MP級(ji)、BA級(ji)、EP級(ji)不(bu)銹鋼管(guan)，AP級(ji)、MP級(ji)、BA級(ji)、EP級(ji)不(bu)銹鋼管(guan)各種區別和等(deng)級(ji)要求。希望對大家有(you)所幫(bang)助，有(you)關這方問(wen)題，可以隨時來(lai)電咨詢(xun)。