Yeh Eck I know it is done and usually engineered into the application. I've also seen what happens to engines, pumps and structures. The galvanic process is actually based on the basic wet cell battery principal. Anode, cathode, conduction path and electrolyte. Two dissimilar metals touching creates a path and introduction of an electrolyte completes it. Coatings and other precautions can be used to disrupt the process by limiting contact or sealing out electrolytes. It can be a price to pay for shiny. My preference is to go chrome if shiny is what I want, but most times it is best to stick to the original fasteners. I just wanted folks to be aware of the possibility. Then they can study up and decide for themselves.