This is the most important part of remedying the rust issue because removal efforts seem wasted if the rust comes back again too quickly. However, using these methods does not address the vital issue of passivation to help protect the stainless steel from future corrosion. Removing rust from stainless steel is easy and can be achieved through the use of any number of different chemicals, abrasives, grinding, blasting, etc.
The longer the corrosion is allowed to persist, the worse it will become, and may even progress to very severe pit corrosion. If corrosion does appear, be it minor “tea staining” discoloration or full blown rust, it is important to deal with it as soon as possible. In these circumstances, regular rinsing with clean water is helpful to remove the chlorides from the surface, but periodic repassivation is also recommended in order to keep the stainless looking nice. Additionally, even stainless steel that has been passivated well can rust due to chloride attack from harsh chemicals such as muriatic acid, as well as long term exposure in highly corrosive environments such as swimming pools, marine areas, winter ice-melting salts, or frequent cleaning with bleach-based cleaners. These are corrosion situations that should be prevented with proper passivation, but are sometimes overlooked. Some of the most frequent causes for rusting on stainless steel are surface iron contamination that was deposited during or after manufacturing, and the alloy structure change along the heat affected zone of welds. The good news is that rust on stainless steel can be removed and prevented from rapid recurrence if the right rust removal solution steps are taken. This can cause some understandable panic for owners of stainless steel equipment, tanks, railings, appliances, sinks, grills, boat hardware, sculptures, and other objects which go from beautiful to ugly due to the appearance of rust. Unfortunately in many situations even stainless steel can develop corrosion which can range from mild tea staining discoloration to thick, flaky rust.
While stainless steel is a corrosion resistant material compared to mild or tool steel, it is truly stain-“less” steel rather than stainproof steel.
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