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Powder Coated Steel and Rust

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Powder Coated Steel and Rust

Are you looking for a metal finishing solution to protect a steel surface from rusting? Have you thought about pursuing powder coating as an option? If so, you’ve probably asked the question: Does powder coated steel rust? If you’re still looking for an answer to this one, then you’re in the right place. 


The shortest, most straightforward answer to this question is: no, powder coated steel does not rust. Powder coating is a corrosion resistant coating, so it is perfectly capable of protecting steel from rust. 


However, the more nuanced answer is: no, powder coated steel does not rust, as long as it is being used properly. 


If you try to powder coat a steel surface that has already started succumbing to rust, you won’t stop the rust in its tracks. You may slow it down, but it will continue to spread and corrode the surface in question. Fortunately, if your steel undergoes proper surface preparation (which may include things like sandblasting to eliminate all existing bits of corrosion), then you won’t have anything to worry about. If there is no rust when the coating is applied, there shouldn’t be any rust, period. 


But, there is one more caveat: if the powder coating is poorly applied it may not be so corrosion resistant, after all. If the coating is too thin, or has cracks, or leaves bare patches, parts of the steel may end up exposed to air and moisture. This, in turn, will cause rust, if they are not well and fully covered by the coating. 


Long story short, powder coated steel won’t rust as long as proper surface preparation occurs and the coating is applied well. 



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