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Risk Evaluation for Coating Thickness Conformity Assessment.

Dubravka Božić¹, Marina Samardžija², Marin Kurtela³

¹Department of Quality, Faculty of Mechanical Engineering and Naval Architecture, University of Zagreb, 10000 Zagreb, Croatia.

Materials (Basel, Switzerland)

|January 21, 2023

Summary

Ensuring optimal epoxy coating thickness on cast iron water pipes is crucial for preventing graphitization corrosion. Statistical process control and measurement uncertainty analysis confirm the coating meets EN 877 standards for durability and environmental resistance.

Keywords:

conformity assessment epoxy coating global consumer’s risk global producer’s risk gray cast iron measurement uncertainty

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Area of Science:

Materials Science
Corrosion Engineering
Quality Control

Background:

Gray cast iron water pipes are susceptible to graphitization corrosion.
Epoxy coatings are applied to protect pipes and ensure longevity.
Meeting specific coating thickness requirements is vital for performance.

Purpose of the Study:

To assess the conformity of epoxy coating thickness on cast iron water pipes.
To ensure the coating meets EN 877 standards for C4 environment and 20-year durability.
To determine the optimal coating thickness considering process and measurement quality.

Main Methods:

Conformity assessment of applied epoxy coating thickness.
Application of statistical process control to the coating procedure.
Analysis of measurement uncertainty in coating thickness determination.

Main Results:

The study analyzed the impact of process and measurement system quality on coating thickness.
Statistical control was implemented to achieve desired product quality.
Optimal coating thickness was determined to ensure product quality and reduce consumer risk.

Conclusions:

Conformity assessment and statistical control are essential for ensuring epoxy coating quality on cast iron pipes.
Accurate measurement and process control guarantee the coating meets durability and environmental resistance standards.
The determined optimal thickness minimizes corrosion risk and extends the service life of water pipes.