Coating Life Prediction: Difficult but Practical Guidance

Summary for coating life prediction Discussion

Predicting coating life on the basis of corrosion rate is presented as a very difficult problem, especially for electroplated bolts. Santosh Kumar asked for a procedure, method, or formula to estimate coating life from corrosion rate. The reply explains that accelerated corrosion tests use unrealistic conditions and therefore have limited value for predicting real-world service life. Rather than offering a universal formula, the answer says the discussion must start with the actual application: where the bolts will be used, what plating system is being considered, and what environmental conditions they will face. In other words, coating life cannot be reliably predicted from corrosion rate alone without context. The answerer emphasizes that a meaningful estimate depends on the specific service environment and coating choice, not just test results.