Gorkus:
You don’t state it, and I’ll have to assume you mean fully carbonated Coca-Cola “soda” at a temperature range of approximately 50 – 120 oF.
I haven’t pumped actual Coke, but I’ve successfully pumped a lot of totally carbonated fluids, including water, for many years employing normal meehanite cast iron or 316 stainless steel. I never experienced any corrosion, pitting, or material failure with these materials.