Chloride corrosion resistance of double-layer anticorrosive coating in simulated concrete pore solution

2021 ◽  
Vol 295 ◽  
pp. 123682
Author(s):  
Lei Qu ◽  
Qing Wang ◽  
Shuangshuang Xu ◽  
Ning Wang ◽  
Zengqin Shi
Keyword(s):  
Corrosion Resistance ◽  
Double Layer ◽  
Pore Solution ◽  
Anticorrosive Coating ◽  
Chloride Corrosion

Einfluss der elektrochemischen Doppelschicht auf die Sorption und den Transport von Chlorionen im Zementstein / Influence of the electrochemical double layer on sorption and transport of chlorides in hardened cement paste

2000 ◽  
Vol 6 (4) ◽  
pp. 415-428
Author(s):  
O. Wowra ◽  
M.J. Setzer
Keyword(s):  
Double Layer ◽  
Cement Paste ◽  
Building Materials ◽  
Pore Solution ◽  
Chloride Ions ◽  
Transport Processes ◽  
Cement Matrix ◽  
Hardened Cement ◽  
Hardened Cement Paste ◽  
Electrochemical Double Layer

Abstract Besides the formation of Friedel salt the transport and binding of chlorides in concrete is mainly defined by the electrochemical double layer at the interface between cement matrix and pore solution. Due to the alkaline pore solution the surface of hardened cement paste is negatively charged which may change to positive values by the potential regulating calcium ions. Inverting of the surface charge leads to an attraction of anions and therefore, to an adsorption of chloride ions in the diffuse part of the electrochemical double layer. Influence from outside like sulphates and carbon dioxide may lead to a decomposition of Friedel salt. Apart from these effect temperature, pH-value and certain environmental conditions affects the electrochemical double layer as well. The chloride equilibrium is mainly controlled by adsorbed ions in the electrochemical double layer. The model presented here is relevant for the assessment of ion transport processes in mineral building materials. Continuing investigations may lead to optimize transport models and a better evaluation of the critical chloride threshold value in reinforced concrete.

Improved corrosion resistance of AZ91D magnesium alloy coated by novel cold-sprayed Zn-HA/Zn double-layer coatings

2020 ◽  
Vol 46 (6) ◽  
pp. 7687-7693 ◽  
Author(s):  
Hai-Long Yao ◽  
Zhi-Hai Yi ◽  
Chao Yao ◽  
Meng-Xian Zhang ◽  
Hong-Tao Wang ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Magnesium Alloy ◽  
Double Layer ◽  
Az91d Magnesium Alloy

scholarly journals Effects of Fe-P Upper Layer Coating Weight on Paintability and Corrosion Resistance of Double Layer Alloy Coated Steel Sheets

1986 ◽  
Vol 72 (8) ◽  
pp. 976-983 ◽  
Author(s):  
Toru HONJO ◽  
Kazuaki KYONO ◽  
Koji YAMATO ◽  
Toshio ICHIDA ◽  
Toshio IRIE
Keyword(s):  
Corrosion Resistance ◽  
Double Layer ◽  
Coated Steel ◽  
Steel Sheets ◽  
Coating Weight ◽  
Layer Coating

Different Concentration of Al(NO3)3 in ZrO2/Al2O3 Double Layer Coating Steel Prepared by Electrolytic Method

2013 ◽  
Vol 594-595 ◽  
pp. 561-565
Author(s):  
Siti Hawa Mohamed Salleh ◽  
Mohd Nazree Derman ◽  
Mohd Zaidi Omar ◽  
Rohaya Abdul Malek
Keyword(s):  
Aqueous Solution ◽  
Corrosion Resistance ◽  
Surface Modification ◽  
Corrosion Rate ◽  
Double Layer ◽  
Stainless Steels ◽  
Coated Steel ◽  
High Carbon ◽  
Engineering Applications ◽  
Layer Coating

Stainless steels, such as 440C steel are commonly used for engineering applications. The high carbon contents of this steel have significantly been attributed to low corrosion resistance properties. Surface modification such as electrolytic double layer coating with ZrO2/Al2O3 was carried out to control the performance. Samples were deposited in ZrO(NO3)2 and Al (NO3)3 aqueous solution respectively. Potentiodynamic examination (Tafel Extrapolation test) was conducted to measure the corrosion resistance of coated steel. The results showed improvements in hardness properties and corrosion rate as the Al2O3 concentration had been increased.

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