chemical odor in water heater

I had a leaking relief valve on by Suburban water heater. I broke the valve while trying to replace it and had to use penetrating fluid and heat to break the threads free. Finally got the old valve out and put the new one in and got it working tip top again.

The problem I have now is that the water coming out of the tap has the distinct odor of the penetrating fluid. I've flushed the tank several times and the odor has decreased... but it is still there.

Does anyone know what I can run through the tank to get rid of the odor? I know you can use bleach or vinegar to get rid of the sulfur smell, just don't know if that will do anything for the chemical smell.

Thanks!