Owners report rust forming on Tesla Cybertruck
Early Tesla Cybertruck owners are reporting small rust spots on the vehicle’s bare stainless steel body after exposure to rain and road contaminants, raising questions about Tesla’s material and design choices. Commenters note that not all stainless steel is equally corrosion-resistant and suggest Tesla may be using a cost- or strength-optimized alloy (likely in the 301 series) that trades off corrosion resistance, especially in salty or harsh environments. While some argue the issue may be limited or comparable to cosmetic rust on conventional cars, many see it as at odds with the Cybertruck’s rugged marketing and evidence of Tesla pushing an unproven material system onto customers.
Material and corrosion basics
- Many comments stress that stainless steel is “stain‑less,” not “stain‑proof.” It’s corrosion‑resistant, not immune.
- Different alloys (e.g., 301, 304, 316, 430) trade corrosion resistance against cost, hardness, strength, and workability.
- Proper grades and treatments (passivation, clearcoats, coatings) can make stainless withstand harsh environments, but all steels can corrode under the right conditions.
- Examples cited: kitchen sinks and high‑grade industrial/meat‑processing equipment that don’t rust vs. cheap cutlery, soap dispensers, and some appliances that do develop spots or pitting.
Cybertruck alloy and design choices
- Tesla markets a proprietary “30X” cold‑rolled stainless reportedly related to 301 and possibly to SpaceX Starship’s shell; some see that as optimized for stiffness/oil‑canning, not corrosion.
- Several argue 301 is less corrosion‑resistant than 304/316 or specialty marine/duplex grades, but cheaper and stronger.
- Some speculate Tesla skipped clearcoat partly for aesthetics/branding (“bare metal, no paint”) and partly for cost; others note Tesla now sells a clearcoat option.
Observed rust and possible causes
- Shared photos show small orange spots and pitting. Some say they resemble the rust spots seen on lower‑grade stainless knives.
- Explanations offered include:
- Inadequate alloy choice and/or passivation.
- Environmental contamination (rail dust, road grime, iron particles, car‑wash brushes).
- Road salt and magnesium chloride, especially in winter climates.
- There’s disagreement on whether this is primarily surface contamination or the Cybertruck’s own steel corroding.
Comparisons to other stainless applications
- DeLorean: also bare stainless; commenters say those don’t typically show early rust, suggesting a better alloy or treatment.
- Trains and marine gear: unpainted 304/316 train cars and 316 marine hardware are invoked to show that successful long‑term stainless applications exist, albeit often with cleaning and/or coatings.
- Household analogies (sinks, dishwashers, grills) are used to argue both “good stainless doesn’t rust in normal use” and “even good stainless can pit in harsh or salty conditions.”
User expectations, manuals, and prevalence
- Tesla documentation reportedly warns owners to promptly remove contaminants (road salt, bird droppings, industrial fallout, etc.); some note similar language appears in other automakers’ manuals.
- One camp argues visible rust within months on a premium “tough work truck” is unacceptable and contradicts its rugged marketing.
- Another camp says many conventional cars also get cosmetic rust spots over time, and the key unknown is how widespread and severe this is for Cybertrucks.
- Some suggest early production Teslas historically have quality issues and advise avoiding first‑generation models.
Humor and cultural reactions
- Many jokes about “patina,” “rust finish,” and the idea of a truck that “can’t go outside.”
- Some see the vehicle as a status/meme object rather than a serious work truck; others acknowledge significant engineering effort but question basic practical decisions.