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  • Şubat 24, 2021
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A common misconception about stainless steel is that it is not affected by corrosion. Although misleading, the amazing success of metal makes this common belief understandable.
What makes stainless steel resistant? Stainless steel is an alloy steel containing at least 10.5% chromium. When chromium comes into contact with oxygen, it forms a natural barrier called the "passivation film" of chromium oxide. Although only micrometers thick, this invisible inert film can repair itself.
In order to ensure that stainless steel itself can "self-repair", the finished product, the fastener, needs to go through a process after its manufacturing process is completed. This process is known as "passivation" has become very controversial and seems to have become less clear due to external forces such as environmental regulations and high costs. Technically speaking, it is still necessary to meet military and aerospace requirements. The fasteners are submerged in a nitric acid solution. This acid treatment, also known as pickling, can remove impurities in the manufacturing process, including oil and grease, and fine metal particles from fastener molds. By removing these external barriers or obstacles, the acid helps to accelerate the formation of the chromium oxide film.
However, although stainless steel can withstand most of the effects of corrosion, it is still affected by a few of corrosion and it may also have a potentially significant impact.
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