EP 2656046 A4 20150701 - CORROSION RESISTANCE EVALUATOR
Title (en)
CORROSION RESISTANCE EVALUATOR
Title (de)
BEWERTER FÜR KORROSIONSBESTÄNDIGKEIT
Title (fr)
DISPOSITIF D'ÉVALUATION DE LA RÉSISTANCE À LA CORROSION
Publication
Application
Priority
- US 201061425454 P 20101221
- US 2011066622 W 20111221
Abstract (en)
[origin: WO2012088335A2] The present invention is directed to a corrosion resistance evaluator suitable for corrosion testing coated metals substrates, such as auto bodies at an accelerated rate. A corrosion resistance evaluator provided with a chamber containing electrolyte to which anode and cathode coated with protective coating being tested are exposed. These coatings are provided with predetermined and standardized defects, such as micro-holes to accelerate the corrosion of the underlying metal substrate in a predictable and repeatable manner. The coated cathode/anode pair is subject to a start-up period followed by series preset DC voltages modulated in triangular, truncated triangular or trapezoidal manner for preset durations that are interspaced with recovery periods. The impedance date collected is then used to arrive at the corrosion performance resistance of the coating applied over the cathode/anode pair. The foregoing evaluator substantially reduces the time required to test corrosion from several days (40 plus days) to few days (about two days).
IPC 8 full level
G01N 17/02 (2006.01)
CPC (source: EP)
G01N 17/02 (2013.01)
Citation (search report)
- [X] WO 2010078547 A1 20100708 - DU PONT [US], et al
- [A] US 2010155262 A1 20100624 - YEPEZ OMAR J [US], et al
- [T] MICHAL KOWALEWSKI: "Selection of excitation signals for high-impedance spectroscopy", JOURNAL OF PHYSICS: CONFERENCE SERIES, INSTITUTE OF PHYSICS PUBLISHING, BRISTOL, GB, vol. 459, no. 1, 6 September 2013 (2013-09-06), pages 12060, XP020250527, ISSN: 1742-6596, [retrieved on 20130906], DOI: 10.1088/1742-6596/459/1/012060
- See references of WO 2012088335A2
Designated contracting state (EPC)
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
DOCDB simple family (publication)
WO 2012088335 A2 20120628; WO 2012088335 A3 20120816; BR 112013015691 A2 20161011; CA 2822438 A1 20120628; CN 103534574 A 20140122; EP 2656046 A2 20131030; EP 2656046 A4 20150701; JP 2014505242 A 20140227; MX 2013007137 A 20130801
DOCDB simple family (application)
US 2011066622 W 20111221; BR 112013015691 A 20111221; CA 2822438 A 20111221; CN 201180068156 A 20111221; EP 11850856 A 20111221; JP 2013546390 A 20111221; MX 2013007137 A 20111221