Oakley (Chairman) - QinetiQ
McCallum – Andrew Francis & Associates (guest)
Baynham – CM BEASY
(Committee) – E.ON New Build & Technology Ltd
2. AGM in January - New Committee members required – please think if you might like to volunteer for this. We meet for an hour before each meeting, but not everyone can get to all meetings, so we also do things by e-mail. Main task: planning the Programme!
(Robin Oakley) opened the meeting.
1.1 'Risk Based Inspection Planning for Ageing Oil and Gas Assets', Steve Matthews, Plant Asset Management, Petrofac
1.2 ‘Engineering and Material Challenges for Dense Phase CO2 Pipeline Transport in High Pressure Dynamic Flow Mode’, Kumar Patchigolla, Cranfield University
Roger Francis (Rolled Alloys)
asked whether anyone had seen an effect of heavy cold work of superduplex
stainless steel on crevice corrosion in seawater. Their previous work
showed that cold work of 5 to 10% had no effect, but this was much more severe
cold work. There were no responses, so research is required.
Clive Tuck (Lloyd’s
Register) asked if anyone knew who were the current experts in the marine
biology of bio-fouling (macro-fouling). Answers
were mainly given by Keith Stokes (DSTL) and Graham Hill (ECHA Microbiology),
who suggested the University of Southampton, The Institute of Oceanography in
Southampton, Portsmouth University and (possibly) Plymouth University.
Robin Oakley (QinetiQ) asked
for any suggestions of suppliers of test facilities for ultra-high pressure
testing. Steve Matthews (Petrofac)
suggested trying Spadeadam ( where GL Nobel-Denton do fire and explosions tests
etc for oil and gas industries).
Barry Torrance (Aish
Technologies) described testing the electrical currents flowing in to and out of
several sheets of freely corroding mild steel in 40-50 ohm-cm seawater.
Some of the currents changed polarity with time as the sheets vied to become
anodic or cathodic to each other, but the total net current was, as expected,
always zero. What was surprising, however, was that the potentials
relative to silver/silver chloride reference electrodes sited close to each
sheet, settled down to around -740mV. For freely corroding steel, around
-600mV had been expected. Could anyone think of an explanation for this?
number of possibilities were offered from the floor, including:
(1) Variation between manufacturers of Ag/AgCl electrodes.
Up to 80mV had been observed.
(2) Low dissolved oxygen.
The presence of sulphides. An ‘Azide
3.1 'Valiant Jetty Project: HMNB Clyde: Faslane: Cathodic Protection’, Brian Wyatt, Corrosion Control Affiliates Ltd, John Thirkettle, Thor Corrosion & Chris Lynch, Corrpro Companies Europe Ltd
Alloys for the Marine Environment, Clive Tuck, Lloyd’s Register EMEA
The Chairman closed
the meeting at approx. 3:15 pm
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