| GAO, Yunnan, Dr ACTIVE | Director | 09 Nov 2022 | | Scotland | June 1978 | Corrosion House, 5 St Peters Gardens, Marefair, Northampton, NN1 1SX, England |
| PETERS, Brenda ACTIVE | Director | 13 Nov 2024 | | England | March 1945 | Corrosion House, 5 St Peters Gardens, Marefair, Northampton, NN1 1SX, England |
| SETIADI, Anthony, Dr ACTIVE | Director | 13 Nov 2024 | | England | August 1980 | Corrosion House, 5 St Peters Gardens, Marefair, Northampton, NN1 1SX, England |
| TATE, Stephen Fleetwood, Dr ACTIVE | Director | 19 Nov 2020 | | Scotland | May 1954 | Corrosion House, 5 St Peters Gardens, Marefair, Northampton, NN1 1SX, England |
| BOOKER, Charles James Louis, Doctor RESIGNED | Secretary | 14 Oct 1992 | 31 Dec 1997 | | | 22 Upper Halliford Road, Shepperton, Middlesex, TW17 8RY |
| BURNELL GRAY, James Sinclair, Dr RESIGNED | Secretary | 11 Nov 1999 | 11 Nov 2004 | | | 20 Kimberley, Teal Farm, Washington, Tyne & Wear, NE38 8TT |
| CHALLIS, Marian Ruth RESIGNED | Secretary | 09 Nov 2000 | 17 Sep 2001 | | | 3 Hazel Road, Uplands, Swansea, SA2 0LU |
| CHALLIS, Marian Ruth RESIGNED | Secretary | 09 Nov 2000 | 17 Sep 2001 | | | 3 Hazel Road, Uplands, Swansea, SA2 0LU |
| FIELD, Edward George RESIGNED | Secretary | 01 Jan 1998 | 11 Nov 1999 | | | 7 Halls Farm Close, Winchester, Hampshire, SO22 6RE |
| GALVIN, Laura, Doctor RESIGNED | Secretary | 12 Jul 2007 | 11 Nov 2010 | | | 10, Hawthorn Road, Selby, North Yorkshire, YO8 8RQ |
| MABBUTT, Stephen John, Dr RESIGNED | Secretary | 11 Nov 2004 | 12 Jul 2007 | | | 99 Yelvertoft Road, Northampton, Northamptonshire, NN2 7TQ |
| MANNING, Michael Ian, Dr RESIGNED | Secretary | | 14 Oct 1992 | | | Oak Field House, Cudworth Lane, Newdigate, Surrey, RH5 5BG |
| AKID, Robert, Dr RESIGNED | Director | 22 Jun 1995 | 03 Jan 2001 | | March 1953 | 85 Dobcroft Road, Sheffield, S7 2LS |
| ALLEN, Michael David RESIGNED | Director | 01 May 1995 | 10 Nov 2000 | United Kingdom | November 1948 | 9 Windmore Avenue, Potters Bar, Hertfordshire, EN6 3BE |
| ALLISON, Peter William RESIGNED | Director | 06 Oct 1998 | 09 Nov 2000 | United Kingdom | October 1947 | 14 Smithy Lane, Wilsden, Bradford, West Yorkshire, BD15 0EG |
| ALLISON, Peter William RESIGNED | Director | 14 Oct 1992 | 20 Oct 1993 | United Kingdom | October 1947 | 14 Smithy Lane, Wilsden, Bradford, West Yorkshire, BD15 0EG |
| ATKINS, Chris RESIGNED | Director | 03 Dec 2015 | 30 Nov 2016 | England | February 1972 | Barratt House Suite S3, Kingsthorpe Road, Northampton, NN2 6EZ, England |
| BALDWIN, Kevin Richard RESIGNED | Director | 01 Jan 1993 | 01 Nov 1994 | | May 1961 | 22 Fellows Road, Farnborough, Hampshire, GU14 6NX |
| BALMER, Brian RESIGNED | Director | 14 Oct 1992 | 06 Dec 1994 | Scotland | August 1952 | 6 Brisbane Street, Largs, Ayrshire, KA30 8QN |
| BATES, Christopher Roger RESIGNED | Director | | 13 Nov 1996 | | June 1948 | 56 St Marys Road, Langley, Slough, Berkshire, SL3 7EL |
| BIBBY, Kenneth Frank RESIGNED | Director | 01 Oct 1995 | 28 Feb 1998 | | July 1932 | Sula 9 Kirkhill, Muckhart, Dollar, Clackmannanshire, FK14 7JQ |
| BODEN, Peter John, Dr RESIGNED | Director | 14 Oct 1992 | 23 Jan 1997 | | September 1928 | 2 Valley Road, Radcliffe On Trent, Nottingham, Nottinghamshire, NG12 1BB |
| BOOKER, Charles James Louis, Doctor RESIGNED | Director | | 31 Dec 1997 | | August 1930 | 22 Upper Halliford Road, Shepperton, Middlesex, TW17 8RY |
| BOWN, James Lawrence, Dr RESIGNED | Director | | 14 Oct 1992 | | May 1944 | 6 Hurst Way, Pyrford, Woking, Surrey, GU22 8PH |
| BRAME, John Leslie Bagnall RESIGNED | Director | | 31 Mar 1991 | United Kingdom | October 1930 | 31 Park Dingle, Bewdley, Worcestershire, DY12 2JY |
| BRIGGS, Michael RESIGNED | Director | | 14 Oct 1992 | United Kingdom | November 1944 | 1 Eastfield Crescent, Woodlesford, Leeds, West Yorkshire, LS26 8SG |
| BROWN, Lawrence David RESIGNED | Director | 14 Oct 1992 | 20 Oct 1993 | | February 1930 | 1 Bryn Tristion, Cynwyd, Corwen, Clwyd, LL21 0LP |
| BURNELL GRAY, James Sinclair, Dr RESIGNED | Director | 01 Jan 1999 | 13 Aug 2005 | | November 1954 | 20 Kimberley, Teal Farm, Washington, Tyne & Wear, NE38 8TT |
| CHALMERS, William Lindsay RESIGNED | Director | 14 Oct 1992 | 01 Oct 1995 | | April 1962 | 53 Harvey Avenue, Newton Mearns, Glasgow, G76 0NQ |
| CLARKE, Michael Anthony RESIGNED | Director | 14 Oct 1992 | 13 Nov 1996 | England | June 1946 | 24 Brockenhurst Gardens, Mill Hill, London, NW7 2JX |
| CLARVIS, Terence William RESIGNED | Director | | 20 Oct 1998 | | June 1936 | Woodcroft House, Crow Hill Drive, Mansfield, Notts, NG19 7AE |
| COLLINS, Anthony James, Dr RESIGNED | Director | 01 Nov 1994 | 30 Jun 2023 | United Kingdom | July 1944 | Corrosion House, 5 St Peters Gardens, Marefair, Northampton, NN1 1SX, England |
| COX, William Michael RESIGNED | Director | 17 Feb 1993 | 10 Nov 2000 | | April 1950 | The First House, Spring Avenue Gee Cross, Hyde, Cheshire, SK14 5LT |
| CROCKET, Patrick RESIGNED | Director | 20 Oct 1998 | 22 Dec 2000 | Scotland | March 1960 | 2 Charles Avenue, Bridge Of Allan, Stirling, Stirlingshire, FK9 4QT |
| CRUNDWELL, Robert Frank RESIGNED | Director | 07 Apr 2010 | 17 Jan 2013 | England | January 1948 | 40, Bennett Road, Four Oaks, Sutton Coldfield, West Midlands, B74 4TH |
| CUTTIS, Robert Alan, Dr RESIGNED | Director | | 19 Sep 1991 | | April 1946 | 42 Clement Road, Marple Bridge, Stockport, Cheshire, SK6 5AG |
| DATTA, Prasanta Kumar, Professor RESIGNED | Director | 01 Nov 1994 | 13 Nov 1996 | England | March 1938 | 35 Willow Way, Darras Hall, Newcastle Upon Tyne, NE20 9RF |
| DAWSON, John Lionel, Dr RESIGNED | Director | | 31 Mar 1991 | | November 1936 | 4 Hollyhurst, Worsley, Manchester, Lancashire, M28 2WG |
| DEACON, David Humfrey RESIGNED | Director | 30 Aug 2001 | 01 Mar 2009 | United Kingdom | October 1936 | Rosedale Cottage, High Street, Eggington, Beds, LU7 9PD |
| DEACON, David Humfrey RESIGNED | Director | 20 Oct 1993 | 11 May 2001 | | October 1936 | 6 Atherstone Court, Two Mile Ash, Milton Keynes, Buckinghamshire, MK8 8AG |
| DEACON, David Humprey RESIGNED | Director | | 26 Nov 1992 | | October 1936 | 21 Cotswold Drive, Linslade, Leighton Buzzard, Bedfordshire, LU7 7UQ |
| DUGGAN, Pat RESIGNED | Director | 04 Aug 1995 | 28 Dec 2000 | | November 1943 | 39 Suncourt, Midleton, Cork, IRISH, Ireland |
| EDYVEAN, Robert Geoffrey John, Dr RESIGNED | Director | | 14 Nov 2002 | | May 1955 | 18 Peterborough Drive, Sheffield, South Yorkshire, S10 4JB |
| FARNELL, Philip George RESIGNED | Director | 13 Nov 1996 | 21 Jan 1999 | England | December 1948 | 42 Gorleston Road, Oulton Broad, Lowestoft, Suffolk, NR32 3AQ |
| FIELD, Edward George RESIGNED | Director | 01 Jan 1998 | 31 Jul 2001 | England | February 1949 | 7 Halls Farm Close, Winchester, Hampshire, SO22 6RE |
| FIELD, Edward George RESIGNED | Director | | 17 Feb 1993 | | February 1949 | 14 Fiona Close, Winchester, Hampshire, SO23 0HB |
| FITZSIMONS, Brendan Michael RESIGNED | Director | 17 Feb 1993 | 10 Nov 2000 | | May 1960 | 61 North Drive, Woodcroft Green, Hebburn, Tyne & Wear, NE31 1EW |
| FLETCHER, John Frederick RESIGNED | Director | 11 Nov 2010 | 29 Nov 2018 | England | September 1949 | Elcometer Limited, Edge Lane, Droylsden, Manchester, M43 6BU, England |
| GALVIN, Laura, Doctor RESIGNED | Director | 03 Nov 2007 | 11 Nov 2010 | United Kingdom | February 1973 | 10, Hawthorn Road, Selby, North Yorkshire, YO8 8RQ |
| GEAREY, David RESIGNED | Director | | 14 Oct 1992 | | June 1939 | 55 Wythenshawe Road, Sale, Cheshire, M33 2JR |
| GRIFFITHS, Kenneth George RESIGNED | Director | 29 Oct 1997 | 07 Oct 1999 | | August 1943 | 70 Youlgreave Drive, Sheffield, Yorkshire, S12 4SG |
| GRIFFITHS, Kenneth George RESIGNED | Director | 20 Oct 1993 | 22 Jun 1995 | | August 1943 | 70 Youlgreave Drive, Sheffield, Yorkshire, S12 4SG |
| HANNAM, Mervyn John RESIGNED | Director | 14 Oct 1992 | 13 Nov 1996 | | July 1932 | 13 The Knapps, Semington, Trowbridge, Wiltshire, BA14 6JG |
| HARROP, Donald RESIGNED | Director | | 14 Feb 2001 | England | November 1949 | 7 Illingworth, Windsor, Berkshire, SL4 4UP |
| HARVEY, David Wilfred RESIGNED | Director | 25 Apr 2006 | 12 Mar 2008 | | November 1945 | 8 Epping Green, Hemel Hempstead, Hertfordshire, HP2 7JP |
| HARVEY, David Wilfred RESIGNED | Director | 04 Mar 1999 | 09 Nov 2000 | | November 1945 | 8 Epping Green, Hemel Hempstead, Hertfordshire, HP2 7JP |
| HARVEY, David Wilfred RESIGNED | Director | | 31 Mar 1991 | | November 1945 | 35 Perry Green, Hemel Hempstead, Hertfordshire, HP2 7NB |
| HEDGES, William RESIGNED | Director | 31 Oct 2019 | 13 Nov 2024 | England | February 1962 | Corrosion House, 5 St Peters Gardens, Marefair, Northampton, NN1 1SX, England |
| HINDS, Gareth, Dr RESIGNED | Director | 30 Nov 2016 | 09 Nov 2022 | England | August 1973 | 68a, High Street, Stony Stratford, Milton Keynes, MK11 1AQ, England |
| HINDS, Gareth, Dr RESIGNED | Director | 09 Nov 2006 | 22 Nov 2012 | England | August 1973 | 192 Broomwood Road, Battersea, London, SW11 6JY |
| HOLMES, Derek Roy, Doctor RESIGNED | Director | 14 Oct 1992 | 20 Oct 1993 | | August 1927 | 9 Langstone Avenue, Havant, Hampshire, PO9 1RU |
| HOUGHTON, Christopher John RESIGNED | Director | | 14 Oct 1992 | | May 1952 | 35 Guildford Road, Woking, Surrey, GU22 7QT |
| HUDSON, Roger Malcolm RESIGNED | Director | 20 Oct 1999 | 28 Dec 2000 | | March 1946 | 4 Meadow Gate Close, Sothall, Sheffield, South Yorkshire, S20 2PR |
| HUDSON, Roger Malcolm RESIGNED | Director | 14 Oct 1992 | 20 Oct 1993 | | March 1946 | 4 Meadow Gate Close, Sothall, Sheffield, South Yorkshire, S20 2PR |
| HULLCOOP, Raymond Sydney RESIGNED | Director | | 14 Oct 1992 | | February 1930 | 33 Sycamore Way, Hazlemere, High Wycombe, Buckinghamshire, HP15 7UD |
| IMPEY, Susan Alice RESIGNED | Director | 18 Oct 2001 | 03 May 2006 | | September 1961 | 21 Church Lane, East Haddon, Northampton, Northamptonshire, NN6 8DB |
| JACOB, William Robin, Dr. RESIGNED | Director | 22 Nov 1995 | 10 Nov 2000 | United Kingdom | December 1941 | 3 Manor Farm, Little Wenlock, Telford, Salop, TF6 5BZ |
| JOHN, David Gareth RESIGNED | Director | | 14 Oct 1992 | | October 1953 | 97 Railway Road, Stretford, Manchester, Lancashire, M32 0QD |
| KING, John William RESIGNED | Director | 01 Nov 1994 | 20 Oct 1998 | England | February 1950 | Hanson House, Grains Road, Delph, Saddleworth, Lancs, OL3 5RN |
| KINGERLEY, Donald Goddard RESIGNED | Director | | 31 Mar 1991 | | February 1932 | 38 Leconfield Road, Loughborough, Leicestershire, LE11 3SQ |
| LAMBERT, Paul, Dr RESIGNED | Director | 21 Feb 2007 | 22 Nov 2012 | United Kingdom | January 1958 | 2 Kirkstone Crescent, Cloughwood, Runcorn, Cheshire, WA7 3JQ |
| LEACH, James Stuart Llewelyn RESIGNED | Director | | 09 Sep 1991 | | July 1924 | The Limes, Hilton Road, Edwalton, Notts, NG12 4AG |
| LEWIS, David Allen RESIGNED | Director | | 23 Oct 1991 | | July 1931 | The Old Vicarage, Lower Westwood, Bradford On Avon, Wiltshire, BA15 2AF |
| LOGAN, Anthony RESIGNED | Director | 14 Oct 1992 | 01 May 1995 | | February 1930 | 34 Whitmore Road, Beckenham, Kent, BR3 3NT |
| LOMAS, Jane Pauline, Dr RESIGNED | Director | 11 Nov 2010 | 13 Nov 2024 | England | June 1957 | Corrosion House, 5 St Peters Gardens, Marefair, Northampton, NN1 1SX, England |
| LYON, Stuart Breingan RESIGNED | Director | 01 Mar 2009 | 11 Nov 2010 | United Kingdom | February 1958 | 23 Granby House, Granby Row, Manchester, Lancashire, M1 7AR |
| LYON, Stuart Breingan RESIGNED | Director | 11 Nov 2004 | 02 Nov 2007 | United Kingdom | February 1958 | 23 Granby House, Granby Row, Manchester, Lancashire, M1 7AR |
| MANNING, Michael Ian, Dr RESIGNED | Director | | 14 Oct 1992 | | December 1946 | Oak Field House, Cudworth Lane, Newdigate, Surrey, RH5 5BG |
| MARTIN, Paul RESIGNED | Director | 20 Oct 1993 | 13 Nov 1996 | | December 1948 | Victoria House, Queen Street Withernsea, Hull, HU192NR |
| MILLS, Douglas John, Doctor RESIGNED | Director | 13 Nov 1996 | 01 Jan 1999 | | May 1948 | 30 Harrow Road, West Bridgford, Nottingham, NG2 7DU |
| MORGAN, Peter Grove RESIGNED | Director | 13 Nov 1996 | 10 Nov 2000 | Wales | August 1948 | Tudor Court Spring Acres, Magor Road, Langstone, Newport, Gwent, NP18 2JX |
| NEUFELD, Peter, Dr RESIGNED | Director | | 14 Oct 1992 | | January 1939 | 21 Little Birches, Sidcup, Kent, DA15 7LN |
| NEVILLE, Anne, Doctor RESIGNED | Director | 28 Feb 1998 | 21 Dec 2000 | | March 1970 | 122/5 Drum Brae Drive, Edinburgh, EH4 7SJ, Scotland |
| NICHOLLS, John Rayment, Professor RESIGNED | Director | 11 Nov 2004 | 03 May 2006 | England | September 1948 | 8 The Green, Great Horwood, Milton Keynes, MK17 0RH |
| NICHOLLS, John Rayment, Professor RESIGNED | Director | 01 Jan 1993 | 13 Nov 1996 | England | September 1948 | 8 The Green, Great Horwood, Milton Keynes, MK17 0RH |
| NORMAN, David RESIGNED | Director | 14 Oct 1992 | 13 Nov 1996 | | March 1945 | 7 Manor Close, Hinckley, Leicestershire, LE10 2NL |
| OSBORNE, Trevor Charles RESIGNED | Director | 11 Nov 2010 | 03 Dec 2015 | England | July 1949 | The Newton Building, St. Georges Avenue, Northampton, Northamptonshire, NN2 6JB, England |
| O`SHEA, John Thaddeus RESIGNED | Director | 10 Jun 1999 | 01 Jun 2006 | | September 1943 | 9 Chelford Road, Bromley, BR1 5QT |
| PALMER, Frederick Herbert RESIGNED | Director | 02 Mar 1995 | 09 Nov 2000 | | February 1930 | 89 Petherton Road, Highbury, London, N5 2QT |
| PALMER, Frederick Herbert RESIGNED | Director | | 20 Oct 1993 | | February 1930 | 89 Petherton Road, Highbury, London, N5 2QT |
| PARKINS, Redvers Nicholson, Professor RESIGNED | Director | | 03 Sep 1991 | | August 1925 | 91 Eastern Way, Ponteland, New Castle, NE20 9RQ |
| PARR, John RESIGNED | Director | 29 Oct 1997 | 07 Mar 2000 | | March 1948 | 26 Sandstone Drive, West Kirby, Merseyside, L48 9UW |
| PETERS, Brenda RESIGNED | Director | 01 Jun 2006 | 11 Nov 2010 | England | March 1945 | Rocklands 9 Rockliffe Villas, Bacup, Lancashire, OL13 8JG |
| PETERS, Brenda RESIGNED | Director | 01 Nov 1994 | 10 Nov 2000 | England | March 1945 | Rocklands 9 Rockliffe Villas, Bacup, Lancashire, OL13 8JG |
| POTTS, Robert RESIGNED | Director | 22 Nov 1995 | 20 Oct 1998 | | March 1951 | Peacock House, Oldcastle, Malpas, Cheshire, SY14 7AE |
| QUINLAN, Sean Finbarr RESIGNED | Director | 28 Feb 1994 | 04 Aug 1995 | | May 1949 | Carberry, Liskillea, Waterfall, Cork, IRISH, Ireland |
| RAY, Guru Prasad Paul, Dr RESIGNED | Director | 22 Nov 1995 | 20 Oct 1998 | | July 1935 | 76 Stillness Road, Forest Hill, London, SE23 1NF |
| SCULLY, John Christopher, Dr RESIGNED | Director | | 20 Oct 1993 | | July 1934 | 1 Creskeld Garth, Bramhope, Leeds, LS16 9EW |
| STACK, Margaret Mary, Doctor RESIGNED | Director | 01 Jan 1993 | 13 Nov 1996 | | October 1961 | 82 Bramhall Lane South, Bramhall, Stockport, Cheshire, SK7 2EA |
| STEVENS, Nicholas Peter Congdon, Dr RESIGNED | Director | 09 Sep 2008 | 11 Nov 2010 | United Kingdom | September 1972 | 40, North Road, Glossop, Derbyshire, SK13 7AU |