什么是AP級、MP級、BA級、EP級不銹鋼管 ?
影響不銹鋼管價格的因素除了品牌、材質和生產工藝以外，最重要因素既鋼管表面處理方法。為進一步改善管道材料特性，對管道內外表面進行處理一般有四種方法: 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。
經過酸洗處理不銹鋼無縫管
MP (Mechanical polishing)機械拋光
拋光輪或拋光帶借助拋光劑中的磨料對不銹鋼管表面進行拋磨加工，促使不銹鋼管面達到平滑拋光效果。亮度與效果則取決于加工方式的種類。另外機械拋光后雖較美觀但也會降低抗蝕性，所以當用在腐蝕環境下需再經過鈍化處理，且鋼管表面常有拋光材料殘留。
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.
經過機械拋光不銹鋼焊管
BA (Bright Annealing)光亮退火
鋼管在制造過程中，用于潤滑的油脂晶粒也會因加工而變形，為了避免油脂殘留在鋼管中，在退火時利用高溫以氬氣充當爐內氣氛，借由氬氣與鋼管表面的碳氧結合燃燒，進-步清潔鋼管的表面產生亮面效果，這種利用純氬氣退火加熱并快速冷卻，以亮化光面的方式叫光輝退火。雖然利用此種方式來亮化表面可保鋼管充分干凈無任何外來污染。但這種表面的明度若與其他拋光方式相較機械、化學、電解會有霧面的感覺。當然其效果也與氬氣的含量與加熱的次數有關。這篇文章主要為大家講解什么是AP級、MP級、BA級、EP級不銹鋼管 ?希望大家能認真看，有問題可以隨便致電聯系我們，我們將盡快為您解答。
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.
經過光亮退火小口徑不銹鋼管
EP (Electro Polishing)電解拋光
電解拋光是利用陽極處理的方式，借由電化學的原理，適當地調整電壓、電流、酸液組成、以及拋光時間，不但可以使表面達到明亮、順滑、潔凈的效果，更可以提升表面的抗腐蝕性,所以是最佳的亮化表面的方法，當然其成本和技術也相應的提高不少。.
經過電解拋光鋼管
不過,因為電解拋光會[乃顯鋼管表面的原始狀態，所以若鋼管表面有嚴重刮傷、孔洞，或是夾渣、析出物等，皆可能造成電解失敗。其與化學拋光不同之處是，雖然也是在酸性環境中進行，但鋼管表面不但不會有任何晶界腐蝕現象，可經由控制表面的氧化鉻膜層厚度，使鋼管達到的抗蝕性。這篇文章主要為大家講解什么是AP級、MP級、BA級、EP級不銹鋼管?希望大家能認真看，有問題可以隨便致電聯系我們，我們將盡快為您解答。
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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