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Tesla Cybertruck May Have A Rust Problem (www.carsdirect.com)

submitted 9 months ago by [email protected] to c/[email protected]

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Tesla Cybertruck May Have A Rust Problem::One of the more standout qualities of the Tesla Cybertruck is its bare stainless-steel body. The stainless-steel body gives the Cybertruck a unique design, but

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[–] [email protected] 97 points 9 months ago (22 children)

One way to keep the Cybertruck’s stainless steel body from rust and damage is to get it wrapped. Interestingly enough, while Tesla saved some money by not clear coating the truck’s body, the automaker offers a “Satin Clear Paint Film” and a “Color Paint Film” for the Cybertruck that costs $5,000 and $6,000. The “self-healing, urethane-based film” protects the truck from scratches and corrosive substances. After hearing about the issues that current owners are having with rust and corrosion on their trucks, we’d consider the film to be a must-have for Cybertruck owners.

There's a fix, it just cost 6k...

[–] [email protected] 11 points 9 months ago (18 children)

They keep using the words “stainless steel” which is an alloy created to be rustproof by removing the iron out of it. So how exactly is this stainless steel if it rusts?

[–] [email protected] 26 points 9 months ago* (last edited 9 months ago) (1 children)

Stainless has chromium added. Iron is still the main element. Different stainless steels have various other elements added, like molybdenum. There’s a wide range of SS for various purposes depending on their formability, weldability, corrosion resistance, heat treatment or precipitation hardened. Some are mildly magnetic (400 series), others not (300 series). Big range of cost too. Not sure which one they used. There’s also a finishing process called passivation that should be used to reduce the likelihood of corrosion.

[–] [email protected] 2 points 9 months ago* (last edited 9 months ago)

You are absolutely right, just for clarity:

Chromium needs to be > 12 weight-%. If you take 18 w-% Cr and 8 w-% Ni you get an austenitic steel which is (normally) neither magnetic nor able to be hardened.

And if you add 12 w-% Cr, you remove 12 w-% Fe. So formally this is right-ish too...

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