In Situ High Pressure Hydrogen Testing Capabilities

PNNL has high pressure hydrogen autoclaves capable of soaking materials up to 5000 psi, and at elevated temperatures.  These are large 1 gallon capacity systems capable of accommodating different in situ test systems.  Electrical feed-throughs provide power and sensing for the instruments.  Short descriptions of available equipment are listed here.

 

 

Tribology: A custom built linear reciprocating (ASTM G133) pin on flat system that is capable of testing samples up to approximately 1” wide at XN, and 5Hz with a stroke length of ½”. The system was designed primarily for polymeric materials, but could potentially accommodate metals testing.
Autoclave Test Methodology
PNNL Preliminary Test Methodology Report 12-22-16

This test methodology describes in situ testing of friction and wear (tribology) of polymers under high pressure hydrogen. This methodology is based in part on the existing tribological standard ASTM G133 “standard test method for linearly reciprocating ball-on-flat sliding wear”. Friction and wear testing under a high-pressure hydrogen environment is critical for hydrogen fueling infrastructure components such as compressors, valves and other actuated devices. Here we present test a methodology for in situ friction andwear studies of polymers under 28 MPa (4,000 psi) hydrogen in a linear reciprocating custom built apparatus. Supporting data from in situ acrylonitrile-butadiene rubber (NBR, commercially Buna-N) tests in 28 MPa (4,000 psi) hydrogen are presented.

Relevant Standards

Standard ID (Prefix "ASTM") Title Status Developed by Subcommittee Book of Standards Volume DOI Active Standard Link
G105 - 16 Standard Test Method for Conducting Wet Sand/Rubber Wheel Abrasion Tests Active G02.30 03.02    
G119 - 09 (2016) Standard Guide for Determining Synergism Between Wear and Corrosion Active G02.40 03.02    
G132 - 96 (2013) Standard Test Method for Pin Abrasion Testing Active G02.30 03.02    
G133 - 05 (2016) Standard Test Method for Linearly Reciprocating Ball-on-Flat Sliding Wear Active G02.40 03.02    
G98 - 17 Standard Test Method for Galling Resistance of Materials Active G02.40 03.02    
G99 - 17 Standard Test Method for Wear Testing with a Pin-on-Disk Apparatus Active G02.40 03.02    
G137 - 97 (2017) Standard Test Method for Ranking Resistance of Plastic Materials to Sliding Wear Using a Block-On-Ring Configuration Active G02.40 03.02    
G77 - 17 Standard Test Method for Ranking Resistance of Materials to Sliding Wear Using Block-on-Ring Wear Test Active G02.40 03.02    
G65 - 16e1 Standard Test Method for Measuring Abrasion Using the Dry Sand/Rubber Wheel Apparatus Active G02.30 03.02    
D2266 - 01 (2015) Standard Test Method for Wear Preventive Characteristics of Lubricating Grease (Four-Ball Method) Active D02.G0.04 05.01    
D2670 - 95 (2016) Standard Test Method for Measuring Wear Properties of Fluid Lubricants (Falex Pin and Vee Block Method) Active D02.L0.11 05.01 10.1520/D2670-95R16 http://www.astm.org/cgi-bin/resolver.cgi?D2670
D3702 - 94 (2014) Standard Test Method for Wear Rate and Coefficient of Friction of Materials in Self-Lubricated Rubbing Contact Using a Thrust Washer Testing Machine Active D02.L0.05 05.01 10.1520/D3702-94R14 http://www.astm.org/cgi-bin/resolver.cgi?D3702
D3704 - 96 (2017) Standard Test Method for Wear Preventive Properties of Lubricating Greases Using the (Falex) Block on Ring Test Machine in Oscillating Motion Active D02.G0.04 05.01 10.1520/D3704-96R17