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Minutes of the General Meeting held at The National Motorcycle Museum, Birmingham, on Wednesday, 7th July 2010.

  PERSONS PRESENT:

     Robin Oakley (Chairman) - QinetiQ
Phil Dent (Vice-Chairman) – Exova
Ben Hooker - Babcock
Robin Jacob - Corrosion Consultancy
Barry Torrance – Aish Technologies
Clive Tuck  - Lloyd’s Register
Jean Tuck – MCF Secretariat
Bob Akid – Sheffield Hallam University (guest speaker)
Simon Banks  – Rolls Royce Submarines
Andrew Bell – BAE Systems
Mick Bignell – MBe International (guest)
Geoff Camm – Deepwater EU Ltd
Roger Francis – RA Materials
Jeanette Gittens – Sheffield Hallam University (guest)
Dennis Greaves - UWS, MoD

Ian Hamilton – Aker Solutions
Dean Horspool – Exova
Christos Kapsalis – KME Germany AG & Co KG
Dave McKenzie - British Energy
Brian Mills – Corrosion Control Services Ltd
Melanie Morris – Corrosion Control Services Ltd
Jon Nichols – Babcock
Carol Powell – CDA
Darren Reid-Hutchings – British Energy
Colin Rivers – INPEX Australia (guest)
Bernd Sagebiel – KME Germany AG &  Co KG
Thomas Smith – Sheffield Hallam University (guest co-presenter)
Keith Stokes – DSTL
Matthew Walters – Exova
Chris Wheatley – CJ Wiretech Ltd

APOLOGIES  

     Charlie Barraclough – Commtech Associates
John Baynham - BEASY
Peter Cutler – NI
Steve Goring - BAC Corrosion Control Ltd
Jagath Mawella - MoD
Stanley Nwaonu - Impalloy
Steve Paterson – Shell
Paul Sykes – Langley Alloys
Julian Wharton (committee)
– University of Southampton
Brian Wyatt – Corrosion Control
Jian-Zhong Zhang – Lloyd’s Register EMEA

 

The Chairman (Robin Oakley) opened the meeting.  

1.   TECHNICAL PRESENTATIONS (part 1):  

1.1   ‘Coatings for Control of Marine Fouling and Microbially Influenced Corrosion’, Bob Akid, Sheffield Hallam University

1.2  ‘The Sheathing of Hot Risers with CuNi’, Bernd Sagebiel, KME Germany AG & Co. KG

2.   OPEN FORUM

2.1       Roger Francis (RA Materials) drew the attention of the meeting to his new book: 'The Corrosion of Copper and Its Alloys: A Practical Guide for Engineers'. 

Contents:  

q       Introduction

q       Alloy Compositions and  Mechanical Properties

q       Film Formation and Properties

q       General Corrosion

q       Localised Corrosion – 10 Types (Pitting, Erosion Corrosion etc)

q       Specific Environments – Atmospheric, Underground,  Waters

q       Joining and Corrosion of Joints

 

Available from: NACE International website, Price: $99 (non members); $75 (members).  Pages: 369, Colour Photos, ISBN 9781575902257

 He also mentioned a forthcoming conference in France which he felt would be of great interest to members.  The Duplex Stainless Steel World Conference will be held in Beaune, France from 13th to 15th October 2010.  The details can be found at the following website:  http://www.stainless-steel-world.net/duplex2010/ShowPage.aspx

2.2.       Colin Rivers (INPEX Australia) asked whether the decisions to move specifications in cupronickel from the 70:30 to 90:10 alloys driven by a rise in Nickel prices had been similarly discussed by members regarding reduced nickel in stainless steel alloys.  He had experienced issues with 316L with nominal 2.5%Mo that had demonstrated susceptibility to both pitting corrosion and stress corrosion cracking.  This had been attributed to Ni and Mo levels very close to specification minima.  The response has been to raise specification requirements to 6% Mo, or even 904 alloys.  (This has arisen with instrument tubing and fittings in tropical marine environments).  

In the following discussion, led by Roger Francis, it was felt that in severe marine atmospheres, 316L and 317L have always been regarded as marginal with a tendency to suffer crevice corrosion at clamps and mounting points and SCC if they get hot.   

904L and 6%Mo austenitic alloys are one solution, but the availability of superduplex instrumentation tubing (ZERON 100 and 2507) offers a lower cost alternative to both austenitic alloys.  Superduplex is typically 20 to 25% lower cost than 6%Mo and about 10% less than 904L.  The latter has poor availability as instrumentation tubing, while tube and fittings in superduplex should be reasonably easy to obtain.  Superduplex has proven corrosion resistance in marine environments, equal to or better than 6%Mo alloys.

2.3.   Robin Oakley (QinetiQ) asked whether the meeting had any advice on the minimum size of compact tension test pieces for KQ fracture toughness measurements? The context is the need to obtain test samples from a high strength steel forging of limited cross-section (the limitations on valid K1C values due to small samples as defined in the relevant national standards is recognised).

 The main answers were as follows: Roger Francis (RA Materials) suggested an approach to NPL, who have a long record of activity in developing fracture toughness test methods.  Dean Horspool (Exova) provided a contact in Exova who is a specialist in fracture toughness testing.  Ian Hamilton (Aker Solutions) made suggestions, and subsequently referred the question to his company specialists.

 

3.    TECHNICAL PRESENTATIONS  (part 2):  

3.1  ‘Use of Arctec (Al-Ti) and Prosion (AlZnIn) Alloys for Thermal Spraying onto Steel for Protection against Corrosion’, Chris Wheatley, CJ Wiretech Limited

3.2    ‘The Role of QA/QC in Corrosion Failures - a Case Study’, Roger Francis, RA Materials

The Chairman closed the meeting at approx. 3:20 pm


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