Corrosion is a complex issue and there is no one-size-fits-all answer. However, it is generally known that bare metal exposed to chloride will experience an increased rate of corrosion. In terms of corrosion performance between chloride-based deicers, including rock salt (sodium chloride), magnesium chloride and calcium chloride, there is little difference. While some vendors may claim that one product is “less corrosive” than another based on lab tests, these tests often do not accurately represent real-world performance. Non-chloride deicers are less corrosive than chloride-based ones, but their deicing performance is relatively weak and they can also be associated with corrosion problems in certain situations.