The copper has been slightly dissolved by the acid in the lemon juice. Copper can be easily beaten into shapes and is one of the best conductors of electricity.
The mild steel boiler plate is strong but does rust and corrode over time. The lemon juice has removed the rust, but the boiler plate will rust over time when exposed to air and water.
The stainless steel has not been affected by the acid in the lemon juice. Stainless steel contains chromium to give it a shiny appearance and resist many stains.
The galvalume metal is slightly affected by the lemon juice acid. Galvalume is coated with 55% aluminum and 45% zinc to resist corrosion. Galvalume is used for many purposes including roof tiles for building.
The galvanized metal coating has been completely dissolved showing bare metal which will rust. Galvanized metal is steel coated with a thin layer of zinc to provide corrosion resistance.
Conclusions: The lemon juice didn't cause any of the metals to rust. I found that some metals actually dissolved, and other ones just got their coating taken off. I observed that the copper was the softest out of the metals that I tested. As far as toughness, there came the galvanized metal, then the galvalume, and finally the stainless steel which was the toughest metal. The stainless steel showed no signs of rust or discoloration at all. Lemon juice is an acidic liquid and its effects on metal are very interesting to me. I hope they were to you to.
Test your knowledge!!!!!!!!!!!
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