Because corrosion is a diffusion-controlled process, it occurs on exposed surfaces. As a result, methods to reduce the activity of the exposed surface, such as passivation and chromate conversion, can increase a material's corrosion resistance.
Foodborne Illnesses Definition: A foodborne illness is an infection or poisoning caused by a bacterium, virus, parasite, or chemical transmitted by food. A foodborne outbreak is an illness event that typically includes two or more people infected from a common food source.
Scientists have counted more than 250 food-related types of illness â from viruses to bacteria to parasites. Most common are Norwalk-like viruses â famous for sickening cruise-ship passengers. They account for about two-thirds of known food-poisoning cases, according to the CDC.