Improvement of corrosion protection properties of calcareous deposits on carbon steel by pulse cathodic protection in artificial sea water

2007 ◽  
Vol 54 (2) ◽  
pp. 74-81 ◽  
Author(s):  
Mohammad Zamanzade ◽  
Taghi Shahrabi ◽  
Ali Yazdian
Keyword(s):  
Carbon Steel ◽  
Corrosion Protection ◽  
Cathodic Protection ◽  
Sea Water ◽  
Calcareous Deposits

scholarly journals The growth mechanism of calcareous deposits under various hydrostatic pressures during the cathodic protection of carbon steel in seawater

RSC Advances ◽  
2017 ◽  
Vol 7 (46) ◽  
pp. 28819-28825 ◽  
Author(s):  
C. J. Li ◽  
M. Du
Keyword(s):  
High Pressure ◽  
Carbon Steel ◽  
Growth Mechanism ◽  
Cathodic Protection ◽  
Crystal Transformation ◽  
Calcareous Deposits

Ca2+ was substituted by Mg2+ in CaCO3 crystallization under high pressure resulting in a crystal transformation from aragonite to dolomite.

An Initial Investigation of Calcareous Deposits upon Cathodic Steel Surfaces in Sea Water

CORROSION ◽  
1981 ◽  
Vol 37 (2) ◽  
pp. 70-76 ◽  
Author(s):  
S. L. Wolfson ◽  
W. H. Hartt
Keyword(s):  
Current Density ◽  
Cathodic Protection ◽  
Sea Water ◽  
Cathodic Current Density ◽  
Water Velocity ◽  
Cathodic Current ◽  
Cathodic Potential ◽  
Electrolyte Flow ◽  
Calcareous Deposits ◽  
Steel Surfaces

Abstract The influence of potential and nominal sea water velocity upon the nature of calcareous deposits formed upon a cathodic steel surface has been investigated. Specific attention was focused upon change with exposure time of the current density to maintain a prescribed cathodic potential and upon thickness of the calcareous film. Equations have been developed whereby pH of the electrolyte adjacent to both a filmed and film-free surface can be rationalized in terms of cathodic current density and character of the electrolyte flow. Structure of calcareous deposits was investigated by scanning electron microscopy. Results are discussed within the frame of current understanding of marine cathodic protection and cathodic protection practices.

Kinetics and Characterisation of Calcareous Deposits under Cathodic Protection in Natural Sea Water

1998 ◽  
Vol 289-292 ◽  
pp. 1163-1180 ◽  
Author(s):  
C. Deslouis ◽  
A. Doncescu ◽  
D. Festy ◽  
O. Gil ◽  
V. Maillot ◽  
...  
Keyword(s):  
Cathodic Protection ◽  
Sea Water ◽  
Calcareous Deposits

The Effect of Cathodic Protection on the Corrosion Fatigue Behavior of Carbon Steel In Synthetic Sea Water

1971 ◽  
Vol 23 (03) ◽  
pp. 283-293 ◽  
Author(s):  
Charles M. Hudgins ◽  
Burton M. Casad ◽  
R.L. Schroeder ◽  
Charles C. Patton
Keyword(s):  
Carbon Steel ◽  
Corrosion Fatigue ◽  
Cathodic Protection ◽  
Sea Water ◽  
Fatigue Behavior

scholarly journals The Interaction of Biofoulants and Calcareous Deposits on Corrosion Performance of Q235 in Seawater

Materials ◽  
2020 ◽  
Vol 13 (4) ◽  
pp. 850
Author(s):  
Jie Zhang ◽  
Zhenhua Yu ◽  
Xia Zhao ◽  
Xiao Lan ◽  
Jiangwei Wang ◽  
...  
Keyword(s):  
Carbon Steel ◽  
Cathodic Protection ◽  
Marine Microorganisms ◽  
Corrosion Performance ◽  
Calcareous Deposits ◽  
Q235 Carbon Steel ◽  
Ocean Conditions

An understanding of the interaction of calcareous deposits and biofoulants on the corrosion performance of steel during the fouling stage is both interesting and necessary. So, the effects of these factors on Q235 carbon steel were investigated and discussed for 20 weeks under real ocean conditions. The results indicate that calcareous deposits are favorable for the attachment of marine microorganisms. However, macroorganisms prefer adhering directly to the substrate. The generations of calcareous deposits have priority over the biofilm attachment under the condition of cathodic protection. Calcareous deposits can prevent steel against corrosion for four weeks without cathodic protection.

AK STEEL 409 ULTRA FORM

Alloy Digest ◽  
2007 ◽  
Vol 56 (4) ◽  
Keyword(s):  
Stainless Steel ◽  
High Temperature ◽  
Carbon Steel ◽  
Physical Properties ◽  
Tensile Properties ◽  
Corrosion Protection ◽  
Automotive Exhaust ◽  
Standard Type ◽  
Temperature Performance ◽  
Complex Shapes

Abstract AK Steel 409 Ultra Form was created for applications needing oxidation or corrosion protection beyond the capability of carbon steel and some coated steels. AK Steel 409 Ultra Form is more formable than standard Type 409 stainless steel and is particularly suitable for parts requiring more complex shapes and improved weldability. Examples of applications include automotive exhaust tubing and stampings. This datasheet provides information on physical properties, hardness, elasticity, and tensile properties as well as deformation. It also includes information on high temperature performance as well as forming and joining. Filing Code: SS-990. Producer or source: AK Steel, Butler Operations.

The study of the electrochemical properties of zinc-rich coating on the base of water sodium silicate

2019 ◽  
Vol 24 (4) ◽  
pp. 51-58
Author(s):  
Le Hong Quan ◽  
Nguyen Van Chi ◽  
Mai Van Minh ◽  
Nong Quoc Quang ◽  
Dong Van Kien
Keyword(s):  
Carbon Steel ◽  
Electrochemical Properties ◽  
Sodium Silicate ◽  
Cathodic Protection ◽  
Electrochemical Impedance ◽  
Steel Substrate ◽  
Electrical Contact ◽  
Electrochemical Impedance Spectra ◽  
Pure Zinc ◽  
Electric Circuits

The study examines the electrochemical properties of a coating based on water sodium silicate and pure zinc dust (ZSC, working title - TTL-VN) using the Electrochemical Impedance Spectra (EIS) with AutoLAB PGSTAT204N. The system consists of three electrodes: Ag/AgCl (SCE) reference electrode in 3 M solution of KCl, auxiliary electrode Pt (8x8 mm) and working electrodes (carbon steel with surface treatment up to Sa 2.5) for determination of corrosion potential (Ecorr) and calculation of equivalent electric circuits used for explanation of impedance measurement results. It was shown that electrochemical method is effective for study of corrosion characteristics of ZSC on steel. We proposed an interpretation of the deterioration over time of the ability of zinc particles in paint to provide cathodic protection for carbon steel. The results show that the value of Ecorr is between -0,9 and -1,1 V / SCE for ten days of diving. This means that there is an electrical contact between the zinc particles, which provides good cathodic protection for the steel substrate and most of the zinc particles were involved in the osmosis process. The good characteristics of the TTL-VN coating during immersion in a 3,5% NaCl solution can also be explained by the preservation of corrosive zinc products in the coating, which allows the creation of random barrier properties.

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