Evaluation of Corrosion Inhibitors by Electrochemical Noise Analysis

1992 ◽  
Vol 139 (3) ◽  
pp. 706-711 ◽  
Author(s):  
C. Monticelli ◽  
G. Brunoro ◽  
A. Frignani ◽  
G. Trabanelli
Keyword(s):  
Corrosion Inhibitors ◽  
Electrochemical Noise ◽  
Noise Analysis

THE USE OF ELECTROCHEMICAL NOISE ANALYSIS ON CORRODING SYSTEMS

2004 ◽  
Vol 04 (03) ◽  
pp. R39-R55 ◽  
Author(s):  
G. MONTESPERELLI ◽  
G. GUSMANO
Keyword(s):  
Electrochemical Noise ◽  
Quantitative Estimation ◽  
Noise Analysis ◽  
Electrochemical Techniques ◽  
Sampling Interval ◽  
Entropy Method ◽  
Corrosion Mechanism ◽  
Statistical Parameters ◽  
Noise Data ◽  
Sampling Duration

This paper gives an overview of the use of Electrochemical Noise (EN) for corrosion studying and monitoring. Since the quality and reliability of noise data are affected by a number of acquisition parameters, such as sampling interval, sampling duration, D.C. trend and instrumental noise, some experimental and practical aspects were discussed. The use of statistical parameters such as standard deviation, Pit Index and/or Localization Index and Noise Resistance to analyze noise data of corroding systems were examined. Many experimental applications of Electrochemical Noise Measurements on different metals and alloys were given. EN data have been compared with traditional electrochemical techniques. EN allowed to characterize the corrosion behavior of samples giving in some cases good quantitative estimation. The transposition of current and potential noise acquisition in the frequency domain (by Fast Fourier Transform and/or Maximum Entropy Method), gave further information on corrosion mechanism and in particular permitted to identify the type of corrosion. Finally the use of Discriminant Analysis permitted to deduce the best sampling frequency and sampling duration for EN acquisition, able to discriminate between two different situations.

scholarly journals Assessing of New Coatings for Iron Artifacts Conservation by Recurrence Plots Analysis

Coatings ◽  
2018 ◽  
Vol 9 (1) ◽  
pp. 12 ◽  
Author(s):  
Paola Roncagliolo Barrera ◽  
Francisco Rodríguez Gómez ◽  
Esteban García Ochoa
Keyword(s):  
Cast Iron ◽  
Statistical Analysis ◽  
Corrosion Inhibitors ◽  
Electrochemical Noise ◽  
High Humidity ◽  
Recurrence Plots ◽  
Surface Corrosion ◽  
Temporary Protection ◽  
Protection Method ◽  
Iron Artifacts

Cast iron has stood for centuries of invention. It is a very versatile and durable material. Coating systems are a low-maintenance protection method. The purpose of this research is to increase the Paraloid coating’s resistance when applied to iron in high humidity atmospheres, with the addition of caffeine (1,3,7-dimethylxanthine) and nicotine (S)-3-(1-methylpyrrolidin-2-yl) pyridine as corrosion inhibitors; the resistance of protection versus exposure time will be evaluated by using electrochemical noise. A statistical analysis of the electrochemical noise signals was carried out. Recurrence plots were used as a powerful tool in the analysis to complement the data obtained and they predicted the evaluation of coatings behaviors performance versus time. The outcomes show that the addition of inhibitors increases and improves the performance as a temporary protection of Paraloid and that protection in high relative humidity was improved. Recurrence plots and parameter quantification show the variances in the surface corrosion dynamics.

Sign in / Sign up

Export Citation Format

Share Document