Bath Conditions Role in Promoting Corrosion Protection on Aluminum Alloy using Rare Earth Conversion Coatings

2011 ◽  
Vol 159 (1) ◽  
pp. C40-C57 ◽  
Author(s):  
S. B. Brachetti-Sibaja ◽  
M. A. Domínguez-Crespo ◽  
A. M. Torres-Huerta ◽  
W. de la Cruz-Hernández ◽  
E. Onofre-Bustamante
Keyword(s):  
Aluminum Alloy ◽  
Rare Earth ◽  
Corrosion Protection ◽  
Conversion Coatings

Corrosion behavior of rare earth metal (REM) conversion coatings on aluminum alloy LY12

2000 ◽  
Vol 284 (1-2) ◽  
pp. 56-63 ◽  
Author(s):  
Yu Xingwen ◽  
Cao Chunan ◽  
Yao Zhiming ◽  
Zhou Derui ◽  
Yin Zhongda
Keyword(s):  
Aluminum Alloy ◽  
Rare Earth ◽  
Corrosion Behavior ◽  
Rare Earth Metal ◽  
Earth Metal ◽  
Conversion Coatings

Influence of buffering on the spontaneous deposition of cerium conversion coatings for corrosion protection of AA2024-T3 aluminum alloy

2014 ◽  
Vol 44 (10) ◽  
pp. 1093-1105 ◽  
Author(s):  
Stephan V. Kozhukharov ◽  
Olaia F. Acuña ◽  
Maria. S. Machkova ◽  
Vladimir S. Kozhukharov
Keyword(s):  
Aluminum Alloy ◽  
Corrosion Protection ◽  
Conversion Coatings ◽  
Spontaneous Deposition

scholarly journals Surface Pretreatments of AA5083 Aluminum Alloy with Enhanced Corrosion Protection for Cerium-Based Conversion Coatings Application: Combined Experimental and Computational Analysis

Molecules ◽  
2021 ◽  
Vol 26 (24) ◽  
pp. 7413
Author(s):  
Mohammad Reza Shishesaz ◽  
Moslem Ghobadi ◽  
Najmeh Asadi ◽  
Alireza Zarezadeh ◽  
Ehsan Saebnoori ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
Corrosion Protection ◽  
Alkaline Solution ◽  
Deposition Time ◽  
Conversion Coating ◽  
Aluminum Surface ◽  
Conversion Coatings ◽  
Acid Washing ◽  
Aa5083 Aluminum Alloy ◽  
Alkaline Cleaning

The effects of surface pretreatments on the cerium-based conversion coating applied on an AA5083 aluminum alloy were investigated using a combination of scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), polarization testing, and electrochemical impedance spectroscopy. Two steps of pretreatments containing acidic or alkaline solutions were applied to the surface to study the effects of surface pretreatments. Among the pretreated samples, the sample prepared by the pretreatment of the alkaline solution then acid washing presented higher corrosion protection (~3 orders of magnitude higher than the sample without pretreatment). This pretreatment provided a more active surface for the deposition of the cerium layer and provided a more suitable substrate for film formation, and made a more uniform film. The surface morphology of samples confirmed that the best surface coverage was presented by alkaline solution then acid washing pretreatment. The presence of cerium in the (EDS) analysis demonstrated that pretreatment with the alkaline solution then acid washing resulted in a higher deposition of the cerium layer on the aluminum surface. After selecting the best surface pretreatment, various deposition times of cerium baths were investigated. The best deposition time was achieved at 10 min, and after this critical time, a cracked film formed on the surface that could not be protective. The corrosion resistance of cerium-based conversion coatings obtained by electrochemical tests were used for training three computational techniques (artificial neural network (ANN), adaptive neuro-fuzzy inference system (ANFIS), and support vector machine regression (SVMR)) based on Pretreatment-1 (acidic or alkaline cleaning: pH (1)), Pretreatment-2 (acidic or alkaline cleaning: pH (2)), and deposition time in the cerium bath as an input. Various statistical criteria showed that the ANFIS model (R2 = 0.99, MSE = 48.83, and MAE = 3.49) could forecast the corrosion behavior of a cerium-based conversion coating more accurately than other models. Finally, due to the robust performance of ANFIS in modeling, the effect of each parameter was studied.

scholarly journals The corrosion protection afforded by rare earth conversion coatings applied to magnesium

2000 ◽  
Vol 42 (2) ◽  
pp. 275-288 ◽  
Author(s):  
Amy L. Rudd ◽  
Carmel B. Breslin ◽  
Florian Mansfeld
Keyword(s):  
Rare Earth ◽  
Corrosion Protection ◽  
Conversion Coatings

Protective chromateless conversion coatings on aluminum alloy

2019 ◽  
pp. 27-32
Author(s):  
A.S. Koryakin ◽  
◽  
Yu.A. Kuzenkov ◽  
S.V. Oleynik ◽  
V.L. Voytitskiy ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
Conversion Coatings

Chromateless protective conversion coatings on 3003 aluminum alloy

2019 ◽  
pp. 23-28
Author(s):  
A.S. Koriakin ◽  
◽  
Yu.A. Kuzenkov ◽  
S.V. Oleynik ◽  
V.L. Voytitsky ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
Conversion Coatings

Effective corrosion protection of 8090 alloy by cerium conversion coatings

2008 ◽  
Vol 53 (26) ◽  
pp. 7760-7768 ◽  
Author(s):  
A. Conde ◽  
M.A. Arenas ◽  
A. de Frutos ◽  
J. de Damborenea
Keyword(s):  
Corrosion Protection ◽  
Conversion Coatings
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