Aluminum can be left unpainted because it forms a natural oxide layer that protects it from corrosion. This oxide layer acts as a barrier, preventing further oxidation and degradation of the metal underneath. As a result, aluminum is often used in applications where a protective coating is not necessary.
Yes, because to conduct electricity you need a metal wire, (usually copper). However they have a plastic outer coating (sheath) which protects them and insulates them.
iron
chemical, because when a penny is tarnished its a chemical change because, its weathered down its destroyed. The tarnish itself is usually either the oxide and/or sulfide of the underlying metal.
No, a reaction will not typically occur between a metal and a solution of its own metal salt. This is because the metal is in a more stable, elemental form and does not have a driving force to displace itself from the salt solution. In general, a metal can only displace another metal from its salt solution if it is higher in the reactivity series.
Aluminum is one metal.
because it is a unreactive metal.
Because it looks good and protects bare metal.
Carbon Fiber. It's often left unpainted, which gives it a beautiful shiny grey-black metal color.
One word, condensation. But the original equipment exhaust systems are lasting longer these days because they are using better metal.
Yes, because to conduct electricity you need a metal wire, (usually copper). However they have a plastic outer coating (sheath) which protects them and insulates them.
A magnet attracts metal because it creates a magnetic field around itself. This magnetic field exerts a force on the metal that aligns its own electrons, causing the metal to be attracted to the magnet.
Because the 'head' of the detector is usually plastic - not metal. The detector coil inside has a relatively short range - and is 'desensitised' to any metal components in the device itself.
Coatings Cathodic Protection If steel- galvanizing
iron
No, freezing rain has no effect on metal itself. It may appear brittle because ice is obviously brittle. But you can smash the ice off and the metal will be fine.
Boron itself is not a metal; it is a metalloid.
No, that is a myth. What actually protects you is the car itself. Sitting inside a car you are basically sitting in a Faraday cage. The lightning travels around the metal body of the car and then jumps to ground. As long as you are not touching the metal body of the car you are safe.