The Penetrate Testing of Nickel Copper Alloy Casting Parts

For the nickel copper alloy casting penetration testing,there often exist problems with the intergranular crack detection.Improvement was made for the test by pretreatment with cleaning liquid and by changing the penetrant testing procedure,and the results showed that the defects were fully exposed to the surface following the corrosion pre treatment by ferric chloride solution,so as to ensure the reliability of test results.