National Physical Laboratory

International standards

NPL plays a key role in the development of international standards for corrosion testing, especially in the International Standards Organisation (ISO), the National Association of Corrosion Engineers (NACE), and to a smaller extent in the American Society for Testing and Materials (ASTM). NPL is also increasingly involved in standards activity in hydrogen and fuel cells, primarily through ISO and the International Electrotechnical Commission (IEC).

ISO

Alan Turnbull is an active member of working groups in ISO TC156, Corrosion of Metals and Alloys, and is convenor of Working Group 2 (WG2) on Environmentally Assisted Cracking.

Current standards under development

  • ISO DIS 6509-2: Corrosion of metals and Alloys - Determination of dezincification resistance of copper alloys with zinc - Part 2: Assessment criteria
  • ISO FDIS 16540: Corrosion of metals and alloys: Methodology for determining the resistance of metals to stress corrosion cracking using the four-point bend method

Previously published standards on environmentally assisted cracking

  • ISO 7539-1: Corrosion of metals and alloys - Stress corrosion testing: General guidance on testing procedures
  • ISO 7539-2: Corrosion of metals and alloys - Stress corrosion testing: Preparation and use of bent-beam specimens
  • ISO 7539-3: Corrosion of metals and alloys - Stress corrosion testing: Method for the preparation and use of U-bend specimens
  • ISO 7539-4: Corrosion of metals and alloys - Stress corrosion testing: Method for the preparation and use of uniaxially loaded tension specimens
  • ISO 7539-5: Corrosion of metals and alloys - Stress corrosion testing: Preparation and use of C-ring specimens
  • ISO 7539-6: Corrosion of metals and alloys - Stress corrosion testing: Preparation and use of pre-cracked specimens for tests under constant load or constant displacement
  • ISO 7539-7: Corrosion of metals and alloys - Stress corrosion testing: Slow strain rate testing
  • ISO 7539-8: Corrosion of metals and alloys - Stress corrosion testing: Preparation and use of specimens to evaluate weldments
  • ISO 7539-9: Corrosion of metals and alloys - Stress corrosion testing: Preparation and use of pre-cracked specimens for tests under rising load or rising displacement
  • ISO 7539-10: Corrosion of metals and alloys - Stress corrosion testing: Reverse U-bend test
  • ISO 7539-11: Corrosion of metals and alloys - Stress corrosion testing: Guidelines for testing the resistance of metals and alloys to hydrogen embrittlement and hydrogen assisted cracking
  • ISO 21601: Corrosion of metals and alloys - Guidelines for assessing the significance of stress corrosion cracks detected in service
  • ISO 11782-1: Corrosion of metals and alloys - Corrosion fatigue testing - Part 1: Cycles to failure testing
  • ISO 11782-2: Corrosion of metals and alloys - Corrosion fatigue testing - Part 2: Crack propagation testing using pre-cracked specimens
  • ISO 15324: Corrosion of metals and alloys - Evaluation of stress corrosion cracking by the drop evaporation test
  • ISO 17081: Method of measurement of hydrogen permeation and determination of hydrogen uptake and transport in metals by an electrochemical technique
  • ISO 6509-1: Corrosion of metals and alloys - Determination of dezincification resistance of copper alloys with zinc - Part 1: Test method

Contact: Alan Turnbull


NACE International

  • Slow Strain Rate Test Method for Screening Corrosion-Resistant Alloys for Stress Corrosion Cracking in Sour Oilfield Service
  • Methodology for Determining the Resistance of Metals to Stress Corrosion Cracking using the Four-Point Bend Method

Contact: Alan Turnbull


IEC

Gareth Hinds is a member of IEC Technical Committee 105 (Fuel Cell Technologies). This committee is responsible for standards in the field of fuel cell technologies for applications such as stationary power plants, transportation (propulsion systems and auxiliary power units) and portable power generation systems. Gareth is an active member of WG11 (Single cell test methods for PEFC and SOFC).

Current standards under development

  • IEC 62282-3-200 Ed. 2.0 Fuel cell technologies - Part 3-200: Stationary fuel cell power systems - Performance test methods
  • IEC 62282-3-201 Ed. 1.0 Fuel cell technologies - Part 3-201: Stationary fuel cell power systems - Performance test methods for small fuel cell power systems
  • IEC 62282-6-200 Ed. 3.0 Fuel cell technologies - Part 6-200: Micro fuel cell power systems - Performance test methods
  • IEC 62282-7-2 TS Ed.1: Fuel cell technologies - Part 7-2: Single cell/stack performance test methods for solid oxide fuel cells (SOFC)

Contact: Gareth Hinds

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