It turns out that the acidity in Coke can help to dissolve rust, but it's not a magic solution. The phosphoric acid in Coke can help to break down the rust, but it may not be enough to completely remove it. Additionally, the sugar in Coke can actually accelerate the rusting process if you're not careful!
Despite the potential drawbacks, many people have reported success with using Coke to remove rust. Some DIY enthusiasts even swear by the method, claiming that it's a cheap and easy way to get rid of rust. But, it's worth noting that Coke is not a substitute for proper rusted metal care and maintenance.
So, why is it that Coke seems to work so well for some people, but not others? It all comes down to the type of metal and the level of rust. For example, Coke may work well on mild rust on aluminum or stainless steel, but it may not be effective on heavily rusted iron or steel. It's also worth noting that Coke can be messy and sticky, so be sure to clean up any spills right away!
The Great Rust-Off — this one’s fizzier than you’d think. - Rustbuster