Screw material identification - will this rust?

They are made of Zinc Yellow Passivated Finish.
Will they rust, if the coating is damaged yes, if not eventual they are bound to. How depends on conditions.
 
Thanks for the reply. I'm building a wooden planter which will be exposed to the elements. Do you reckon these screws would do?
 
You might get some surface rust, especially if you scratch the head while putting them in (less likely with torx) but not enough to do any structural damage, just aesthetic.
 

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