Technical Essentials of Pitting Corrosion Test of Ferric Chloride in ASTM G48-11

The pitting corrosion test of ferric chloride is mainly used to evaluate the pitting corrosion resistance of corrosion resistant alloys. The pitting corrosion test of ferric chloride in ASTM G48-11 was analyzed. The technical points and practical experiences of pitting corrosion test of ferric chloride were introduced from the aspects of test equipments, test solutions, sample preparation and test methods. The results show that there could be some errors in the details of solution preparation, sample surface treatment, sample placement time node and so on during the pitting corrosion test of ferric chloride for corrosion resistant alloy welded joints, and which would affect the accuracy of the test results. In daily inspection work, the regularity of test details should be strengthened, the accuracy of test results should be continuously improved, and reliable test data should be provided for enterprise production.