EP 2656047 A2 20131030 - CORROSION RESISTANCE EVALUATOR
Title (en)
CORROSION RESISTANCE EVALUATOR
Title (de)
BEWERTER FÜR KORROSIONSBESTÄNDIGKEIT
Title (fr)
SYSTÈME D'ÉVALUATION DE LA RÉSISTANCE À LA CORROSION
Publication
Application
Priority
- US 201061425462 P 20101221
- US 2011066419 W 20111221
Abstract (en)
[origin: WO2012088236A2] 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 a stepwise 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)
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 2012088236 A2 20120628; WO 2012088236 A3 20120809; BR 112013015685 A2 20160920; CA 2822607 A1 20120628; CN 103518128 A 20140115; EP 2656047 A2 20131030; EP 2656047 A4 20150701; JP 2014500516 A 20140109; MX 2013007139 A 20130801
DOCDB simple family (application)
US 2011066419 W 20111221; BR 112013015685 A 20111221; CA 2822607 A 20111221; CN 201180068137 A 20111221; EP 11852196 A 20111221; JP 2013546361 A 20111221; MX 2013007139 A 20111221