Stainless steel is more than just a corrosion-resistant metal. Stainless steel is often chosen as the versatile material of choice for many applications as a result of its material strength, resistance to corrosion, and also because it can be adapted to fit specific conditions.
This applies not only to the various chemical compositions that make upstainless steelbut also to the variety of surface finishes and treatments that can be applied depending on the final intended use for the product.
Image Credit: Shutterstock/Maxx-studio
2B还是不2B？
2B级是不锈钢行业中最常用的饰面之一。它是半充实，光滑且均匀的，尽管它不是镜子饰面。表面是过程的最后一步。钢板首先是通过在滚筒之间在滚筒之间压在炉子之间而形成的。然后通过退火来软化，然后反复通过滚筒。
To remove surface impurities, the surface is pickled with acid and passed between polished rollers on the last several passes to achieve the desired thickness. It is this final pass that allows the 2B finish to be achieved.
对于常见的不锈钢等级，包括201、304、304 L和316 L，2B是标准表面。除了经济性和增加耐腐蚀性外，使2B饰面流行的原因是，使用布轮和化合物非常简单。
Typically, steel with a 2B finish is found within food processing, baking equipment, vessels, tanks, and pharmaceutical equipment, and it meets USDA standards for those industries.
当最终产品是可注射溶液或耳用溶液时，这种方法是不可接受的。这是因为可以在金属表面上产生缝隙或口袋。这些空隙会在抛光剂表面或金属表面下方捕获污染物。最终，这种异物将逃脱并污染产品。Electropolishing表面是提高此类应用表面光滑度的理想和建议方法。
Source: Astro Pak Corporation
|
2B Finish without EP |
2b结束EP |
|
304不锈钢具有2B饰面。
Magnified at 1500x |
304 Stainless Steel with 2B finish and then electropolished. Magnified at 1500x |
| Description |
Produced at the mill by passing steel plate between polished rollers. Smooth and semi-reflective |
通过溶解表面金属以去除峰和污染物而产生。光滑，类似镜面的饰面 |
| 常见应用 |
直接食物接触，包括烘焙，食物加工和坦克。制药设备制造app亚博体育 |
Injectable Pharmaceutical Manufacturing Food Processing to reduce bacterial attachment |
| Sanitation Protocols |
苛刻的卫生冲洗 |
Can withstand long-term caustic sanitary washdown |
| 定义标准 |
ASTM A480 |
ASTM B912 |
| 粗糙度平均值（RA） |
0.3 µ - 1.0 µ |
0.1 µ -0.8 µ |
平滑
Electropolishing removes the raised areas on the surface of stainless steel by using chemistry and electricity to smooth it. The actual surface of the stainless steel does not appear smooth under magnification, even with a factory-applied 2B smooth surface.
粗糙度平均值（RA）用于表达金属表面的平滑度，这是对表面一部分低点和高点之间的平均差异的比较。
Typically, factory-fresh 2B-finished stainless steel has a Ra value ranging from 0.3 micrometers (.0003 mm) to 1 micrometer (.001 mm), depending on its gauge (thickness). The surface Ra can be decreased by proper electropolishing to between 4 and 32 microinches, depending on the metal’s gauge.
What Does A 2B Finish Mean?
A Grade 2B finish is achieved by compressing the material through two rollers. Some operators have asked for the finish to be repaired after having a vessel or other equipment modified or repaired.
尽管使用机械或电抛光实现饰面，但很容易复制，但可能非常接近，尤其是在RA值方面。适当的结果electropolishing treatmentcan even achieve better performance in material handling than the original, untreated 2B finish.
因此，2B饰面可以看作是一个很好的起点。具有众所周知的有益特性，2B饰面是经济的。可以通过对表面平滑，达到更高标准并产生一系列长期收益的电力来进一步增强。
This information has been sourced, reviewed and adapted from materials provided by Astro Pak Corporation.
For more information on this source, please visitAstro Pak Corporation。