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Keywords: diffusible hydrogen
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eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1988
ISBN-10: 0-8031-0959-8
ISBN: 978-0-8031-0959-9
... or developed for the direct measurement of diffusible hydrogen in welds. This report compares many of these tests with each other and with the coating moisture test. The methods of measuring diffusible hydrogen that were compared were the International Institute of Welding (IIW) test (collection over mercury...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1988
ISBN-10: 0-8031-0959-8
ISBN: 978-0-8031-0959-9
... In recent years, there has been a rising interest in diffusible hydrogen testing of steel weld metals. Several test methods have been used with varying degrees of success. The glycerin displacement method, which has been widely used, has been demonstrated to be inaccurate and under certain...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1988
ISBN-10: 0-8031-0959-8
ISBN: 978-0-8031-0959-9
... to explain the relationship between the partial pressure of hydrogen measured in the welding arc and the hydrogen content of the completed weld. diffusible hydrogen gas metal arc welding gas chromatology spectroscopy hydrogen arc atmosphere Dawn R. White 1 and William G. Chionis 2 In-Process...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1988
ISBN-10: 0-8031-0959-8
ISBN: 978-0-8031-0959-9
... An electrochemical method to determine diffusible hydrogen in steels is described. It is a simple but very sensitive device which is capable of measuring hydrogen concentrations of less than 1 weight ppm. The method makes use of nickel/nickel oxide as a polarizing electrode, which is coupled...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1982
ISBN-10: 0-8031-0741-2
ISBN: 978-0-8031-0741-0
... in pressure vessel codes can be optimized in each weld zone. An additional study was completed for welds using a newly developed flux material. postweld heat treatment (PWHT) ISR 2¼Cr-1Mo steel hydrogen induced weld cracking (transverse crack) pressure vessel diffusible hydrogen submerged arc...