Corrosion cells were constructed by fastening new lead coupons to the lids of 50 mL polypropylene centrifuge tubes with a silicone sealant. Beforehand, coupons (Canada Metal North America, Québec, Canada) were cleaned by immersion for 2 minutes in 1.8 M HNO3 followed by thorough rinsing with ultrapure water. This step was repeated afterward with 40 mM HNO3.