Degradation of material properties by high-pressure hydrogen is an important factor in determining the safety and reliability of materials used in high-pressure hydrogen storage and delivery. Hydrogen damage mechanisms have a time dependence that is linked to hydrogen outgassing after exposure to the hydrogen atmosphere that makes ex-situ measurements of mechanical properties problematic. Designing in-situ measurement instruments for high-pressure hydrogen is challenging due to known hydrogen incompatibility with many metals and standard high-power motor materials like Nd. Here we detail the design and operation of a solenoid based in-situ tensile tester under high-pressure hydrogen environments up to 5,000 psi. Modulus data from high-density polyethylene (HDPE) samples tested under high-pressure hydrogen are also reported as compared to baseline measurements taken in air.
Revised: January 13, 2015 |
Published: October 10, 2014
Citation
Alvine K.J., T.A. Kafentzis, S.G. Pitman, K.I. Johnson, D.C. Skorski, J.C. Tucker, and T.J. Roosendaal, et al. 2014.An In-situ Tensile Test Apparatus for Polymers in High Pressure Hydrogen.Review of Scientific Instruments 85, no. 10:Article No. 105110.PNNL-SA-102958.doi:10.1063/1.4899315