Calcareous scales deposited in the organic coating defects during artificial seawater cathodic protection: Effect of zinc cations

2019 ◽  
Vol 784 ◽  
pp. 744-755 ◽  
Author(s):  
M. Ahmadzadeh ◽  
T. Shahrabi ◽  
M. Izadi ◽  
I. Mohammadi ◽  
S.M. Hoseinieh ◽  
...  
Keyword(s):  
Cathodic Protection ◽  
Organic Coating ◽  
Artificial Seawater ◽  
Protection Effect ◽  
Zinc Cations

scholarly journals Investigation on the Cathodic Protection Effect of Low Pressure Cold Sprayed AlZn Coating in Seawater via Numerical Simulation

Coatings ◽  
2017 ◽  
Vol 7 (7) ◽  
pp. 93 ◽  
Author(s):  
Guosheng Huang ◽  
Xiaodan Lou ◽  
Hongren Wang ◽  
Xiangbo Li ◽  
Lukuo Xing
Keyword(s):  
Numerical Simulation ◽  
Cathodic Protection ◽  
Low Pressure ◽  
Protection Effect

Corrosion Protection of Nano-Silica Powder Coatingon Artificial Seawater

2021 ◽  
Vol 904 ◽  
pp. 519-524
Author(s):  
Gui Yun Zhang ◽  
Yong Wang ◽  
Tian Wei Zhang ◽  
Chen Yu Zhao
Keyword(s):  
Corrosion Protection ◽  
Corrosion Behavior ◽  
Sea Water ◽  
Electrochemical Impedance ◽  
Water Solution ◽  
Electrochemical Corrosion ◽  
Artificial Seawater ◽  
Protection Effect ◽  
Aluminum Sheets ◽  
Electrochemical Corrosion Behavior

Sea water resources are extensive and can be used to extinguish fires, but their corrosiveness is a major problem. Using the method of electrochemical workstation, the electrochemical corrosion behavior of aluminum sheet in artificial sea water solution and silica-coated artificial seawater was studied; by analyzing the surface morphology, polarization curve and electrochemical impedance spectroscopy, the electrochemical corrosion behavior of aluminum sheets under different immersion times and different immersion media is obtained. The conclusion is that the coating of nanosilica powder has a certain corrosion protection effect on artificial seawater.

Experimental Study on the Effect of Cathodic Protection System for Concrete Slab Specimens with Zn-Mesh Sacrificial Anode in Marine Environment

2013 ◽  
Vol 785-786 ◽  
pp. 264-272
Author(s):  
Jin A Jeong ◽  
Chung Kuk Jin
Keyword(s):  
Marine Environment ◽  
Current Density ◽  
Cathodic Protection ◽  
Concrete Slab ◽  
Reinforced Concrete Structures ◽  
Sacrificial Anode ◽  
Protection Effect ◽  
Protection Technology ◽  
Cathodic Prevention ◽  
Cathodic Protection System

This study is to acquire the confirmation data regarding the cathodic protection (CP) characteristics for slabs in marine bridges and piers exposed to hash seawater environments. It was possible to confirm the performance of CP only by the measurement of CP potentials for the slab specimens applied with zinc mesh sacrificial anode CP system. The CP current density for the cathodic protection (CProt) that CP started after a repair of corrosion was 2 times higher than that for the cathodic prevention (CPrev) that CP commenced from the beginning of experiment, and the most of protection current density (87.0-91.5%) flew to the closer top rebar in slab specimens. 4 hour depolarization potentials were higher in the CPrev system than in the CProt one, and it was confirmed that the CPrev has more protection effect with less protection current, comparing to the CProt. It was also confirmed that the CP of both CPrev and CProt by means of zinc mesh sacrificial anode for reinforced concrete structures were very effective corrosion protection technology in marine environment.

A Study on Effects of Mechanical Stress and Cathodic Protection on Marine Coatings on Mild Steel in Artificial Seawater

2016 ◽  
Vol 25 (9) ◽  
pp. 3863-3879 ◽  
Author(s):  
Hong-Qi Yang ◽  
Qi Zhang ◽  
San-Shan Tu ◽  
Yi-Min Li ◽  
You Wang ◽  
...  
Keyword(s):  
Mild Steel ◽  
Mechanical Stress ◽  
Cathodic Protection ◽  
Artificial Seawater ◽  
Marine Coatings

scholarly journals Study on the Influence of Pulse Current Cathodic Protection Parameters of Oil Well Casing

2019 ◽  
Vol 2019 ◽  
pp. 1-9
Author(s):  
Xiang-qian Xu ◽  
Hao-bin Zhou
Keyword(s):  
Cathodic Protection ◽  
Duty Cycle ◽  
High Frequency ◽  
Pulse Current ◽  
Oil Fields ◽  
Oil Well ◽  
Characteristic Structure ◽  
Protection Effect ◽  
Wave Pulse ◽  
Square Wave

Pulse current cathodic protection had obvious advantages over traditional DC cathodic protection, but when square-wave pulse current was used for cathodic protection of oil well casing, the influence of pulse protection parameters on potential distribution was not very clear. Therefore, according to the current situation of oil fields in China, the typical formation characteristic structure of oil wells was selected and the cathodic protection model of pulse current for oil well casing was established. Based on the established model, the effects of pulse current parameters (frequency and duty cycle) and anode distance on the cathodic protection effect of square-wave pulse current were studied. The results showed that better protection effect could be obtained by choosing appropriate anode distance, high frequency, and moderate duty cycle.

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