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Floating dust or embedded iron
On any surface, free iron will rust and corrosion of stainless steel. Therefore, must clear. Floating powder can be removed with the dust. Some adhesion strong, must according to the iron treatment of embedded. In addition to dust, many sources of surface iron, including ordinary carbon steel wire brush to clean up and previously used in carbon steel, low alloy steel or cast iron used sand, glass beads or other abrasive for shot peening, or referred to in front of in the vicinity of stainless steel parts and equipment of non stainless steel products for grinding. When the material or hanging over the process if not stainless steel to take protective measures, wire rope, sling and the work table of iron is easy to embed or polluted surface.γγThe order and making inspection can prevent and find the free iron, ASTM standard A380[3] defines rust test to check the surface of stainless steel iron or steel particles. When asked to absolutely can not have iron, should use the method of inspection. If the results are satisfactory, the application of clean water or nitric acid washing on the surface, until the dark blue completely disappeared. As A380[3] pointed out if rust test solution can not be completely clean out, is not recommended in the process on the surface of equipment, is used to test this method of using direct contact surface of production for human consumption. Test method for simple is exposed to 12~24 hours in water, check whether there is rust. The test sensitivity is poor, and time-consuming. These are the test, not cleaning method. If found to have iron, chemical and electrochemical methods must be used after the introduction of the cleaning.γγ |
| Company: |
Ningbo Mingzhi Stainless Product Co.,Ltd
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| Contact: |
Ms. candice hu |
| Address: |
hemudu |
| Postcode: |
315000 |
| Tel: |
86-0574-551143335 |
| Fax: |
86-0574-87270981 |
| E-mail: |
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