Um....

Wd40 isn't a lube, it's a cleaner


......................

Go buy a $6 bottle of wet chain lube and learn to not replace your chain every other ride

And yes, wd40 causes the metal in the chain to break down, when you use lube, it protects the metal. If you can protect the metal well enough, you might never replace your chain.

And no, Triflow is not chain lube, but only light oil