I built a product with an embedded rpi and dealt with this same problem. The solution was to purchase "industrial" SD cards. I ended up using ATP micro SD cards

I built a product with an embedded rpi and dealt with this same problem. The solution was to purchase "industrial" SD cards. I ended up using ATP micro SD cards. You can find them on Digikey. They are almost double the price, but I have not had a single SD corruption since switching to them. In my experience the samsung SD cards would be corrupted when the power was pulled around 30% of the time.