Thank you Jenn so much for the feedback you posted on the Home Depot website. Moen takes consumer comments very seriously and we are delighted to have the opportunity to assist you. The Moen Home Care 16 in. x 1 in. Concealed Screw Grab Bar with Shelf in Brushed Nickel is corrosion resistant. For further assistance with your Moen shelf, please contact Moen directly at 800-289-6636. Our business hours are 8:00 a.m. - 7:00 p.m. Monday through Friday Eastern Time.