On Tuesday, November 23, 2021 at 7:49:07 AM UTC-5, Ruk wrote:
I have a need to use some nichrome wire for an outdoor project where it
will be partially exposed to the elements (mainly humidity extremes but
also might get wet at times). Is it corrosion proof? Thank you.
Nothing, not even fine gold, is corrosion-*proof*. But, there are grades of Nichrome from -20 to -80, as the nickel content increases, its general resistance to corrosion also increases - with caveats.
Nichrome-80 is suitable for exposed use and corrosion-resistant at very high temperatures, and is most used for critical applications. Nichrome-60 is most commonly used in household devices such as toasters and space-heaters, as well as back-up heat in
older heat-pumps and electric house furnaces and similar. Nichrome-20 is often used for fasteners and clamps that do not carry power, but must be heat-resistant and relatively corrosion-resistant.
For high-humidity environments, specifically, N-60 is the most commonly used - as a specific example - the heating element in a clothes dryer.
Peter Wieck
Melrose Park, PA
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