What is a key characteristic of mass loss coupons?

Mass loss coupons are a practical tool used to monitor corrosion. A key characteristic of these coupons is that they help assess both general attack and localized corrosion over a specific period. When immersed in a corrosive environment, these coupons corrode, and the amount of mass lost can be measured after exposure. This measurement indicates the overall corrosion rate, allowing for the assessment of general attack across the entire surface of the coupon.

Additionally, while mass loss coupons do provide some insight into localized corrosion, they primarily reflect the average condition of the exposed metal over time. By evaluating the weight loss, one can understand how severe the corrosion is and make informed decisions regarding materials, protection strategies, and maintenance. Thus, their role in assessing both general and localized corrosion makes them essential in corrosion management practices.