(19)

(11)

EP 2 550 376 A1

(12)

(43) Date of publication: 30.01.2013 Bulletin 2013/05 (21) Application number: 11712655.7 (22) Date of filing: 23.03.2011

(51) International Patent Classification (IPC):  C22C 23/06(2006.01) C22F 1/06(2006.01) (86) International application number: PCT/GB2011/050579 (87) International publication number: WO 2011/117630 (29.09.2011 Gazette 2011/39)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR (30) Priority: 25.03.2010 GB 201005029 (71) Applicant: Magnesium Elektron Limited Salford, Manchester M50 3XE (GB)	(72) Inventors: LYON, Paul Bolton Lancashire BL7 9RL (GB) BODEN, Antony James Sheffield Yorkshire S36 8WD (GB) (74) Representative: Andrews, Paul David et al Muritroyd & Company 165-169 Scotland Street Glasgow, Strathclyde G5 8PL Glasgow, Strathclyde G5 8PL (GB)