Method for diffusible hydrogen analysis in welding materials by gas chromatography

  • Ramón Piloto Rodríguez Instituto Superior Politécnico “José Antonio Echeverría”
  • Tiel García Hernández Instituto Superior Politécnico "José Antonio Echeverría"
  • Mario Basterrechea Rey Universidad de La Habana
Keywords: E-7018 electrodes, welding, diffusible hydrogen

Abstract

A new method was developed by gas chromatography for diffusible hydrogen analysis in E-7018 ordinary electrodes, using a packed column and nitrogen as reference and carrier gas. The method includes two thermal treatments to the weld pieces, before and after the welding process.

The quantitative analysis was made using the external standard method. The method is selective, and the linearity is adequate between 0-20 μL of hydrogen, with a dynamic range between 0,69-17,28 μL. The correlation coefficient higher than 0,99 in all cases indicate good correlation. The accuracy has a mean value of 99,46%. The detection and quantification limits have values adequate to our aims. There were found differences between both methods, glycerine and gas chromatography. The developed and proposed method can be used for routine analysis of hydrogen in welding materials using E-7018 electrodes.

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Author Biographies

Ramón Piloto Rodríguez, Instituto Superior Politécnico “José Antonio Echeverría”

Profesor Asistente.

Mario Basterrechea Rey, Universidad de La Habana

Facultad de Química.

References

Funderburk, Scott. “Selecting filler metals: low hydrogen”. En: Welding Innovation. Vol. 17, N.° 1. 2000.

American Welding Society. “Standard methods for determination of the Diffusible Hydrogen content of Martesinic, Bainitic and Ferritic Steel Weld Metal produced by arc welding”. 1993. p. 16.

UNE 14-614-83. “Determinación del Hidrógeno en metal aportado procedente de la utilización de electrodos revestidos en la soldadura de aceros suaves y de baja aleación”. En: Instituto Español de Normalización. 1983.

Grob, Robert. Modern Practice of Gas Chromatography. Wiley Interscience. New York. 3th Edition. 1995.

Schmid, María. “Gestión de Calidad III”. En: Noticias Técnicas del Laboratorio. N.° 4. 2001.

Schmid, María. “Gestión de Calidad II”. En: Noticias Técnicas del Laboratorio. N.° 2. 2001.

Published
2004-06-01
How to Cite
Piloto Rodríguez R., García Hernández T., & Basterrechea Rey M. (2004). Method for diffusible hydrogen analysis in welding materials by gas chromatography. Revista Facultad De Ingeniería Universidad De Antioquia, (31), 93-101. Retrieved from https://revistas.udea.edu.co/index.php/ingenieria/article/view/344512