<p style="text-align: center;"><strong><span style="font-size: 18pt;">Why do scratches occur when polishing stainless steel with 600 mesh white corundum powder?</span></strong></p>
<br class="break/" /><br class="break/" /><span style="font-size: 18pt;">When polishing stainless steel or other metal workpieces with 600 mesh <a href="https://www.xinliabrasive.com/products/White-Fused-Alumina"><em><span style="color: #0000ff;"><strong>white corundum (WFA)</strong></span></em></a> powder, scratches may occur due to the following key factors:</span>
<br class="break/" /><br class="break/" /><a href="https://www.xinliabrasive.com/Why-do-scratches-occur-when-polishing-stainless-steel-with-600-mesh-white-corundum-powder.html/%e5%be%ae%e4%bf%a1%e5%9b%be%e7%89%87_20250617143154_%e5%89%af%e6%9c%ac" rel="attachment wp-att-5524"><img decoding="async" src="/wp-content/uploads/2025/06/微信图片_20250617143154_副本-1024x576.jpg" class="aligncenter" alt="微信图片_20250617143154_副本" /></a>
<a href="https://www.xinliabrasive.com/products/White-Fused-Alumina"><em><span style="color: #0000ff;"><strong><span style="font-size: 18pt;">1. Uneven particle size distribution and large particle impurities</span></strong></span></em></a>
<br class="break/" /><br class="break/" /><span style="font-size: 18pt;">The typical particle size range of 600 mesh white corundum powder is about 24-27 microns. If there are too large particles in the powder (such as 40 microns or even 100 microns), it will cause severe surface scratches.</span>
<span style="font-size: 18pt;">Common reasons include:</span>
<span style="font-size: 18pt;">Improper grading resulting in mixed mesh sizes;</span>
<span style="font-size: 18pt;">Improper crushing or screening during production;</span>
<span style="font-size: 18pt;">Impurities such as stones, anti-caking agents or other foreign materials mixed during packaging or handling.</span>
<br class="break/" /><br class="break/" /><a href="https://www.xinliabrasive.com/products/White-Fused-Alumina"><span style="color: #0000ff;"><em><strong><span style="font-size: 18pt;">2. Skipping the pre-polishing step</span></strong></em></span></a>
<br class="break/" /><br class="break/" /><span style="font-size: 18pt;">The polishing process should follow a gradual progression from coarse abrasives to fine abrasives.</span>
<span style="font-size: 18pt;">Directly using 600# WFA without sufficient pre-polishing may not remove the deeper scratches left in the early stage, and in some cases, it may even aggravate surface defects.</span>
<br class="break/" /><br class="break/" /><a href="https://www.xinliabrasive.com/Why-do-scratches-occur-when-polishing-stainless-steel-with-600-mesh-white-corundum-powder.html/%e5%be%ae%e4%bf%a1%e5%9b%be%e7%89%87_20250617143150_%e5%89%af%e6%9c%ac" rel="attachment wp-att-5525"><img decoding="async" src="/wp-content/uploads/2025/06/微信图片_20250617143150_副本-1024x576.jpg" class="aligncenter" alt="微信图片_20250617143150_副本" /></a>
<span style="color: #0000ff;"><a href="https://www.xinliabrasive.com/products/White-Fused-Alumina" style="color: #0000ff;"><em><strong><span style="font-size: 18pt;">3. Improper polishing parameters</span></strong></em></a></span>
<br class="break/" /><br class="break/" /><span style="font-size: 18pt;">Excessive pressure or rotation speed increases the friction between the abrasive and the surface;</span>
<span style="font-size: 18pt;">This can cause local overheating, soften the stainless steel surface, and cause thermal scratches or deformation.</span>
<br class="break/" /><br class="break/" /><strong><span style="font-size: 18pt;">4. Inadequate surface cleaning before <a href="https://www.xinliabrasive.com/products/White-Fused-Alumina"><em><span style="color: #0000ff;">polishing</span></em></a></span></strong>
<br class="break/" /><br class="break/" /><span style="font-size: 18pt;">If the surface is not thoroughly cleaned beforehand, residual particles such as metal chips, dust, or hard contaminants may be embedded in the polishing process, causing secondary scratches.</span>
<br class="break/" /><br class="break/" /><strong><span style="font-size: 18pt;">5. Incompatible abrasive and workpiece materials</span></strong>
<br class="break/" /><br class="break/" /><span style="font-size: 18pt;">White corundum has a Mohs hardness of 9, while 304 stainless steel has a Mohs hardness of 5.5 to 6.5;</span>
<span style="font-size: 18pt;">Sharp or irregularly shaped WFA particles may exert excessive cutting forces, causing scratches;</span>
<span style="font-size: 18pt;">Improper shape or morphology of abrasive particles can make this problem worse.</span>
<br class="break/" /><br class="break/" /><strong><span style="font-size: 18pt;">6. Low powder purity or poor quality</span></strong>
<br class="break/" /><br class="break/" />
<span style="font-size: 18pt;">If 600# WFA powder is made from low-grade raw materials or lacks proper air/water flow classification, it may contain high impurities.</span>