Yahoo Answers is shutting down on May 4th, 2021 (Eastern Time) and beginning April 20th, 2021 (Eastern Time) the Yahoo Answers website will be in read-only mode. There will be no changes to other Yahoo properties or services, or your Yahoo account. You can find more information about the Yahoo Answers shutdown and how to download your data on this help page.

Anonymous
Anonymous asked in Science & MathematicsChemistry · 1 decade ago

Questions About Metal Rusting?

Can a paperclip rust a day in salt water?

also how long will it take for these metals to rust in salt water:

penny

steel spoon

small ball of aluminum foil

thank you

2 Answers

Relevance
  • 1 decade ago
    Favorite Answer

    Paperclip - Might take a while.

    Penny - Not sure what American coins are made of but most likely this is an alloy of more than one metal, making it harder to corrode

    Steel spoon - Presuming that you mean stainless steel...it won't rust, since it's made for the elements, and it's an alloy of many different metals.

    Small ball of aluminum foil - Won't rust. Aluminum has a protective oxide coating that acts as a shield to prevent the actual aluminum from corroding

  • 1 decade ago

    Can a paperclip rust in a day? Probably. Just make a small nick/scratch in the paper clip and it will rust faster.

    Penny? I'm not sure. Probably awhile.

    Steel spoons are usually plated with another metal; so if you remove that metal coating, it will probably rust just as fast as a paperclip (if a paperclip were the size of the spoon)

    Al foil... Aluminum will not rust very far; Aluminum becomes aluminum oxide -- see rubies/sapphires. This coating protects the aluminum so it will not rust beyond a very thin coating of aluminum oxide. However, if you add a little bit of liquid mercury, it will rust.

Still have questions? Get your answers by asking now.