Some metal pedals aren't too durable either. These were my old pedals after a week of owning the bike. One scraped the asphalt as I made a turn. The other one hit a door on the way into the house.

And ... I was going to take a picture but I already threw the old, deformed pedals in the trash because my studded pedals came today. The old ones were all metal, mind you. It just appeared that the metal was extremely thin and soft. I've had plastic pedals before and they've never been bent out of shape from scraping the asphalt.

I got the "Meetlocks" pedals from Amazon. They work well because they're a bit wider than the old ones and seem to hold my feet better; my foot actually rests on the pedal completely. The studs seem to make a bit of difference in terms of traction. No slipping today as I put the pedals through the wringer.

Amazon.com : MEETLOCKS® Bike Pedal, Injection Aluminum Magnesium Alloy Body, Cr-Mo CNC Machined 9/16"Screw Thread Spindle, Ultra Du/sealed Bearing. : Sports & Outdoors