Effect Of Silicon On Corrosion Behaviour Of Al-Zn As A Low Voltage Sacrificial Anode For Marine Environment

Pratesa, Yudha; Utama, Ahmad A.; Erianto, Ardi; Ferdian, Deni

doi:10.1088/1757-899x/547/1/012056

Cited by 5 publications

(3 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Therefore, effective corrosion protection measures are crucial to ensure the longevity and safety of these steel structures in such corrosive environments. Cathodic protection is a cost-effective and commonly used technique for the mitigation of corrosion in aggressive marine environments, as compared to the use of corrosion-resistant nickel-based alloys [3]. There are two main types of cathodic protection techniques: Impressed Current Cathodic Protection (ICCP) and Sacrificial Anode Cathodic Protection (SACP).…”

Section: Introductionmentioning

confidence: 99%

Development of an Al-Zn-Bi alloy sacrificial anode for the protection of steel in artificial seawater: an electrochemical analysis

Qureshi,

Farooq,

Wasim

et al. 2024

Mater. Res. Express

View full text Add to dashboard Cite

The Al-Zn sacrificial anodes are widely used for cathodic protection in marine steel structures. This study evaluates the impact of bismuth addition on the electrochemical properties of the Al-Zn sacrificial anode in artificial seawater. The microstructure analysis confirms the presence of uniformly distributed intermetallic β-AlFeSi and spherical Bi particles within the α-Al matrix. The open circuit potential (OCP) comparison between Al-Zn-Bi and carbon steel reveals a potential difference of approximately 400 mV, indicating sufficient cathodic protection for the steel. Electrochemical impedance measurements indicate the initial hindered dissolution of the anode due to surface film formation, which later dissociates due to the aggressive attack of Cl– species in the electrolyte. The sufficiently negative surface potential (–0.875 V vs. Ag/AgCl) observed at 10 mA/cm² demonstrates the suitability of anode for fulfilling the cathodic protection criteria of steel structures.

show abstract

Section: Introductionmentioning

confidence: 99%

Development of an Al-Zn-Bi alloy sacrificial anode for the protection of steel in artificial seawater: an electrochemical analysis

Qureshi,

Farooq,

Wasim

et al. 2024

Mater. Res. Express

View full text Add to dashboard Cite

show abstract

“…ensure the longevity and safety of these steel structures in such corrosive environments. Cathodic protection is a cost-effective and commonly used technique for mitigating corrosion in aggressive marine environments, as compared to the use of corrosion-resistant nickel-based alloys [3]. There are two main types of cathodic protection techniques: Impressed Current Cathodic Protection (ICCP) and Sacrificial Anode Cathodic Protection (SACP).…”

Section: Introductionmentioning

confidence: 99%

Development of an Al-Zn-Bi alloy sacrificial anode for the protection of steel in artificial Seawater: An electrochemical analysis

Qureshi

Farooq

Wasim³

et al. 2023

Preprint

View full text Add to dashboard Cite

The Al-Zn sacrificial anodes are widely used for cathodic protection in marine steel structures. This study evaluates the impact of bismuth addition on the electrochemical properties of the Al-Zn sacrificial anode in artificial seawater. The microstructure analysis confirms the presence of uniformly distributed intermetallic β-AlFeSi and spherical Bi particles within the α-Al matrix. The open circuit potential (OCP) comparison between Al-Zn-Bi and carbon steel reveals a potential difference of approximately 400 mV, indicating sufficient cathodic protection for the steel. Electrochemical impedance measurements indicate the initial hindered dissolution of the anode due to surface film formation, which later dissociates due to the aggressive attack of Cl– species in the electrolyte. The sufficiently negative surface potential (-0.875 V vs. Ag/AgCl) observed at 10 mA/cm² demonstrates the suitability of anode for fulfilling the cathodic protection criteria of steel structures.

show abstract

“…The properties of aluminium anodes are adversely affected by impurities, especially Fe and Si, which increase the corrosion rate of Al–Zn alloys and adversely increase the potential of operating anode to a more positive value [ 25 ].…”

Section: Introductionmentioning

confidence: 99%

The Effect of Increasing the Amount of Indium Alloying Material on the Efficiency of Sacrificial Aluminium Anodes

et al. 2021

View full text Add to dashboard Cite

Al-Zn-In alloys having 4.2% zinc content and various indium content in the range of 0.02–0.2% were tested with respect to the most important electrochemical properties of sacrificial anodes in a cathodic protection, i.e., the current capacity and potential of the operating anode. The distribution of In and Zn in the tested alloys was mapped by means of the EDX technique, which demonstrated that these elements dissolve well in the alloy matrix and are evenly distributed within it. The current capacity of such alloys was determined by means of the method of determining the mass loss during the dissolution by a current of known charge. The results obtained demonstrate that the current capacity of Al-Zn-In alloy decreases with the increase in the In content, which results in an increased consumption of anode material and shorter lifetime of anodes. With 0.02% In content, the capacity amounted to approx. 2500 Ah/kg, whereas the alloy with 0.2% In had as much as 30% lower capacity amounting to approx. 1750 Ah/kg. Microscopic examination for the morphology and surface profile of the samples after their exposure demonstrated that a higher indium content in the alloy results in a more uneven general corrosion pattern during the dissolution of such alloy, and the cavities (pits) appearing on the alloy surface are larger and deeper. As the indium content is increased from 0.02% to 0.05%, the Al-Zn-In alloy potential decreases by about 50 mV to −1100 mV vs. Ag/AgCl electrode, which is advantageous in terms of using this alloy as a sacrificial anode. When the indium content is further increased from 0.05% to 0.2%, the potential of the alloy is no longer changed to a more negative one. The results obtained from all these tests demonstrate that alloys containing up to 0.05% of In additive are practically applicable for cathodic protection.

show abstract

Effect Of Silicon On Corrosion Behaviour Of Al-Zn As A Low Voltage Sacrificial Anode For Marine Environment

Cited by 5 publications

References 11 publications

Development of an Al-Zn-Bi alloy sacrificial anode for the protection of steel in artificial seawater: an electrochemical analysis

Development of an Al-Zn-Bi alloy sacrificial anode for the protection of steel in artificial seawater: an electrochemical analysis

Development of an Al-Zn-Bi alloy sacrificial anode for the protection of steel in artificial Seawater: An electrochemical analysis

The Effect of Increasing the Amount of Indium Alloying Material on the Efficiency of Sacrificial Aluminium Anodes

Contact Info

Product

Resources

About