Patent SG-11201407198U-A (SG)
Title: System and method for providing corrosion protection of metallic structure using time varying electromagnetic wave
Inventor: CHEW HWEE HONG
IPC: C23F15/00
Filed: 2012-10-11
Abstract: (12) INTERNATIONAL APPLICATION PUBLISHED UNDER THE PATENT COOPERATION TREATY (PCT) (19) World Intellectual Property Organization International Bureau (43) International Publication Date 17 April 2014 (17.04.2014) WIPOIPCT (10) International Publication Number WO 2014/058388 A1 (51) International Patent Classification: C23C 8/00 (2006.01) C23F13/02 (2006.01) C23C 22/00 (2006.01) C23F15/00 (2006.01) (21) International Application Number: (22) International Filing Date: (25) Filing Language: (26) Publication Language: PCT/SG2012/000380 11 October 2012 (11.10.2012) English English (71) Applicant: ECOSPEC GLOBAL TECHNOLOGY PTE LTD [SG/SG]; 60 Admiralty Road West, Singapore 759956 (SG). (72) Inventor: CHEW, Hwee Hong; 60 Admiralty Road West, Singapore 759956 (SG). (74) Agent: CHONG, Y F; P. O. Box 0399, Psa Building, Singapore 911144 (SG). (81) Designated States (unless otherwise indicated, for every kind of national protection available)'. AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IS, JP, KE, KG, KM, KN, KP, KR, KZ, LA, LC, LK, LR, LS, LT, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW. (84) Designated States (unless otherwise indicated, for every kind of regional protection available)'. ARIPO (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, SZ, TZ, UG, ZM, ZW), Eurasian (AM, AZ, BY, KG, KZ, RU, TJ, TM), European (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR), OAPI (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, ML, MR, NE, SN, TD, TG). Declarations under Rule 4.17: — of inventorship (Rule 4.17(iv)) Published: — with international search report (Art. 21(3)) (54) Title: SYSTEM AND METHOD FOR PROVIDING CORROSION PROTECTION OF METALLIC STRUCTURE USING TIME VARYING ELECTROMAGNETIC WAVE 00 00 m oo © o CJ o & Fig. 1 (57) Abstract: The present invention provides a system for providing corrosion protection of a metallic structure using time varying electromagnetic wave, comprising: a generator for generating electromagnetic wave having a time varying frequency, said generator having at least two output terminals in electrical connection respectively with first and second ex­ citation sites which are positioned in spaced manner a on the metallic structure, allowing for subjecting the metallic struc­ ture to the electromagnetic wave; and an electric power source connected to the generator for applying a driving voltage to the generator to drive the generation of the electromagnetic wave; wherein the driving voltage and/or the frequency of the electromagnetic wave are selected such that the metallic struc­ ture is energized to form in-situ passive a oxidized species of the metal on surface of a the metallic structure, which species is insusceptible to corrosion. The invention also provides a method for providing corrosion protection of a metallic struc­ ture using time varying electromagnetic wave.