The corrosion resistance of stainless steel gratings is a subjective determination by individuals. It cannot be discerned just by appearance; it is only after use that one can truly know its resistance. Therefore, there cannot be a fixed standard.

2. Corrosion resistance of stainless steel trench covers varies under different conditions; be more meticulous when making your selection.

The manual should contain specific data on the corrosion resistance of stainless steel gratings, but this data only reflects the corrosion resistance during testing. We cannot use this standard to measure the corrosion resistance of stainless steel gratings in everyday life. The specific conditions need to be considered for the determination.