Menu
Search
Filters
Close
Menu

03400 CHARACTERIZATION OF LOCALIZED CORROSION IN MULTILAYERED WC-Ti1-xAlxN COATINGS ON AISI D2 STEEL

Picture for 03400 CHARACTERIZATION OF LOCALIZED CORROSION
Available for download
Product Number: 51300-03400-SG
ISBN: 03400 2003 CP
Author: S.H. Ahn, J.H. Yoo, J.G. Kim, J.G. Han
$0.00
$20.00
$20.00
Multilayered WC-Til_xAlxN coatings are characterized by periodically repeated structures of lamellae of WC- Ti/WC-Tia_xAI×N. WC-TiI.xAlxN coatings of changing A1 concentration were deposited on AISI D2 steel by high-ionization sputtered plasma vapor deposition (PVD). The A1 concentration could be controlled by using evaporation source for A1 and fixing the evaporating rate of other metals. Four kinds of WC-TiI_xAlxN coatings were prepared: WC-Ti0.6A10.4N, WC-Ti0.53A10.47N, WC-Ti0.sA10.sN and WC-Ti0.43A10.svN. The corrosion behavior of WC-Til_xAlxN coatings was investigated using electrochemical techniques in deaerated 3.5% NaC1 electrolyte (galvanic corrosion test, potentiodynamic polarization test, electrochemical impedance spectroscopy and Mott-Schottky method) and surface analyses (GDOES, RBS, XRD, SEM and XPS). Particular attention was paid to the effect of growth defects on the coating properties related to the corrosion behavior. The results of the coating and substrate galvanic corrosion test showed low galvanic current densities. In the potentiodynamic polarization test and EIS measurement, the corrosion current density of WC-Ti0.sAlo.sN was lower than others and presented higher Rct values than others after 240 hours immersion time. This could be attributed to the formation of a dense TiO2 passive film, which promotes partial closing of the defects. Capacitance values obtained from EIS as a function of different potentials (C -2 vs E) showed that the passive film exhibited an n-type semiconductor behavior.

Keywords : GDOES, RBS, galvanic corrosion test, EIS, Mott-Schottky method
Multilayered WC-Til_xAlxN coatings are characterized by periodically repeated structures of lamellae of WC- Ti/WC-Tia_xAI×N. WC-TiI.xAlxN coatings of changing A1 concentration were deposited on AISI D2 steel by high-ionization sputtered plasma vapor deposition (PVD). The A1 concentration could be controlled by using evaporation source for A1 and fixing the evaporating rate of other metals. Four kinds of WC-TiI_xAlxN coatings were prepared: WC-Ti0.6A10.4N, WC-Ti0.53A10.47N, WC-Ti0.sA10.sN and WC-Ti0.43A10.svN. The corrosion behavior of WC-Til_xAlxN coatings was investigated using electrochemical techniques in deaerated 3.5% NaC1 electrolyte (galvanic corrosion test, potentiodynamic polarization test, electrochemical impedance spectroscopy and Mott-Schottky method) and surface analyses (GDOES, RBS, XRD, SEM and XPS). Particular attention was paid to the effect of growth defects on the coating properties related to the corrosion behavior. The results of the coating and substrate galvanic corrosion test showed low galvanic current densities. In the potentiodynamic polarization test and EIS measurement, the corrosion current density of WC-Ti0.sAlo.sN was lower than others and presented higher Rct values than others after 240 hours immersion time. This could be attributed to the formation of a dense TiO2 passive film, which promotes partial closing of the defects. Capacitance values obtained from EIS as a function of different potentials (C -2 vs E) showed that the passive film exhibited an n-type semiconductor behavior.

Keywords : GDOES, RBS, galvanic corrosion test, EIS, Mott-Schottky method
PRICE BREAKS - The more you buy, the more you save
Quantity
1+
5+
Price
$20.00
$20.00
Product tags
Also Purchased
Picture for 03382 USING EIS TO BETTER UNDERSTAND TANK LINING
Available for download

03382 USING EIS TO BETTER UNDERSTAND TANK LINING PERFORMANCE IN LABORATORY AND FIELD EVALUATION

Product Number: 51300-03382-SG
ISBN: 03382 2003 CP
Author: Linda G.S. Gray, MSc, Brent Drader, Mike O’Donoghue, Ph.D., Ron Garrett, Jamie Garrett, Ron Graham,
$20.00
Picture for 03394 ELECTROCHEMICAL QUARTZ CRYSTAL MICROBALANCE
Available for download

03394 ELECTROCHEMICAL QUARTZ CRYSTAL MICROBALANCE STUDY ON GOLD AND PHASES IN AA 2024-T3

Product Number: 51300-03394-SG
ISBN: 03394 2003 CP
Author: G. S. Frankel, J. Kang, Y. Baek
$20.00
Picture for 03395 DETECTING THE SUSCEPTIBILITY OF AUSTENITIC
Available for download

03395 DETECTING THE SUSCEPTIBILITY OF AUSTENITIC STAINLESS STEELS TO INTER:GR:ANULAR: CORROSION BY THE MEANS OF THE POTENTIOSTATIC ELECTROCHEMICAL REACTIVATION TEST (ER:T)

Product Number: 51300-03395-SG
ISBN: 03395 2003 CP
Author: O.Greven, H.-E. Buhler
$20.00
Categories
Industry
Recently viewed
Popular tags
View all

Association for Materials Protection and Performance

© AMPP All Rights Reserved.
Membership Terms of Content Use
Contact Customer Support