US 7713405 B2

 

　　ABSTRACT

 

　　An electrochemical noise method, apparatus and system may be used to estimate and/or calculate parameters of interest related to corrosion rates of an electrically conductive article. The apparatus involves a working electrode （having substantially the same composition of the electrically conductive article）， a reference electrode, and a counter electrode in an environment of interest. The working electrode is placed under potentiostatic control. A current transient between the working electrode and the counter electrode is measured. The working electrode is switched to open potential. A potential transient is measured over the duration of a localized corrosion event. The localized corrosion may then be calculated based on the measured potential transient and the current transient.

 

　　摘要

 

　　電化學(xué)噪聲的方法，裝置和系統(tǒng)可被用于估計(jì)和/或計(jì)算有關(guān)的導(dǎo)電性物品的腐蝕速率的感興趣的參數(shù)。該裝置包括一個(gè)工作電極（具有基本導(dǎo)電性物品的相同組合物），參比電極，并在感興趣的環(huán)境中的對(duì)電極。將工作電極置于恒電位下的控制。在工作電極和對(duì)電極之間的電流瞬變的測(cè)量。在工作電極被切換到開路電勢(shì)。在一個(gè)局部腐蝕事件的持續(xù)時(shí)間里一個(gè)瞬時(shí)電勢(shì)被測(cè)量。局部腐蝕然后可以基于所測(cè)量的電勢(shì)瞬間，電流瞬態(tài)計(jì)算。