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LightningInAJar
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- Unrusting metal?
Is there a metal that can never rust? I am tired of cars rusting even with antirust treatments.
Platinum is a good contender also:https://en.wikipedia.org/wiki/Gold#Chemistry said:Gold does not react with oxygen at any temperature and, up to 100 °C, is resistant to attack from ozone.
More info:https://en.wikipedia.org/wiki/Platinum#Physical said:The metal has excellent resistance to corrosion, is stable at high temperatures and has stable electrical properties. Platinum does oxidize, forming PtO2, at 500 °C; this oxide can be easily removed thermally.
https://en.wikipedia.org/wiki/Corrosion#Resistance_to_corrosion said:Intrinsic chemistry
Gold nuggets do not naturally corrode, even on a geological time scale.
The materials most resistant to corrosion are those for which corrosion is thermodynamically unfavorable. Any corrosion products of gold or platinum tend to decompose spontaneously into pure metal, which is why these elements can be found in metallic form on Earth and have long been valued. More common "base" metals can only be protected by more temporary means.
Some metals have naturally slow reaction kinetics, even though their corrosion is thermodynamically favorable. These include such metals as zinc, magnesium, and cadmium. While corrosion of these metals is continuous and ongoing, it happens at an acceptably slow rate. An extreme example is graphite, which releases large amounts of energy upon oxidation, but has such slow kinetics that it is effectively immune to electrochemical corrosion under normal conditions.
Passivation
Passivation refers to the spontaneous formation of an ultrathin film of corrosion products, known as a passive film, on the metal's surface that act as a barrier to further oxidation. The chemical composition and microstructure of a passive film are different from the underlying metal. Typical passive film thickness on aluminium, stainless steels, and alloys is within 10 nanometers. The passive film is different from oxide layers that are formed upon heating and are in the micrometer thickness range – the passive film recovers if removed or damaged whereas the oxide layer does not. Passivation in natural environments such as air, water and soil at moderate pH is seen in such materials as aluminium, stainless steel, titanium, and silicon.
LightningInAJar said:Summary:: Unrusting metal?
Is there a metal that can never rust? I am tired of cars rusting even with antirust treatments.
https://silodrome.com/stainless-steel-allegheny-ludlum-fords/ said:The reason cars aren’t all made from stainless steel comes down to two (maybe three) factors. The first factor is that stainless steel is more expensive, the second factor is that it’s harder to work with and harder to weld, and the possible third factor is that it doesn’t rust which means cars would potentially last indefinitely. Clearly this would be less than ideal for the automotive industry, which relies on people buying new cars every few years.
https://www.hemmings.com/stories/article/stainless-sensation-1936-ford-tudor said:Its resistance to corrosion, however, was what caught ol' Henry's attention in the late 1920s. A number of trim pieces on the Model A Ford, including the radiator shell, headlamp buckets and other various pieces of brightwork were made out of stainless steel; it replaced nickel-plating, which had proven to be not nearly as durable in the long term.
Sure enough, it wasn't long before Ford built three complete Model A bodies, including wheels, out of stainless; the bodies cost roughly $2,000 each--four times what a Model A cost to start with. Ford retained one example and two were given to a couple of steel companies as promotional tools; today, all have either been destroyed or have gone missing.
And so the 1936 Ford Tudor Deluxe sedan you see here, and the five others that were built alongside it, are not the first-of-their-kind harbingers of cutting-edge futurethink that many assume that they are. They did, however, manage to survive: Four of the six cars are still extant. Allegheny Ludlum, a steel company based in Pennsylvania, had them built by Ford as promotional tools, both to show off the wonders of stainless steel and as incentives for the sales department--free use of the car for a year if you were on top. But just because they lived long lives didn't mean they weren't a difficult birth: Pressing the body panels ruined Ford's tooling. The tools, dies and presses on the Ford line were designed to work with standard carbon steel, rather than high-chromium stainless, which is stronger and less flexible; some changes had to be made to the stamping dies, and welding various pieces together with the gas-welding technology of the day also posed a challenge.
[...]
As for the cars themselves, one went to each of Allegheny Ludlum's district offices in New York, Philadelphia, Cleveland, Detroit, Chicago and St. Louis. These were no trailer-queen promotional pieces shuttled to events. Oh, no, these were workhorses, each of them running for a purported 200,000 miles before they were retired from the Allegheny Ludlum fleet in 1946. They did their job, showing off the wonders of stainless steel to a public that automatically assumed that steel + water = rust, and convincing them to approach the material with an open mind. After a decade on the road, the bodies still looked great, but the drivelines were well-worn; they were standard-issue Ford pieces after all, used 20,000 miles a year for a solid decade.
Move to Tucson?LightningInAJar said:I am tired of cars rusting even with antirust treatments.
Which parts of the replies from Jack and myself did you not understand?LightningInAJar said:Lets assume can't rust, corrode, or oxidize.
As of now, there is no metal that is completely unrustable. However, there are metals that are highly resistant to rust, such as stainless steel and titanium.
Rust, or corrosion, occurs when iron or its alloys react with oxygen and water, forming iron oxide. This process is accelerated by exposure to salt or acidic substances.
Yes, certain coatings or treatments can greatly reduce the likelihood of rusting. For example, galvanization involves coating a metal with a layer of zinc to protect it from corrosion.
Yes, scientists and engineers are constantly working towards developing new materials and techniques to improve the durability and resistance of metals. However, achieving 100% unrustability is still a challenge.
While it is possible for a metal to have extremely high resistance to rust, it is unlikely for it to never rust at all. This is because environmental factors, such as exposure to moisture and corrosive substances, can still affect the metal over time.