Challenges and solutions of cathodic protection for marine ships

Xu, Likun; Xin, Yonglei; Ma, Li; Zhang, Haibing; Lin, Zhifeng; Li, Xiangbo

doi:10.1016/j.corcom.2021.08.003

Cited by 42 publications

(21 citation statements)

References 46 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Since Na 2 S was a strong reducing agent which may reduce the photoanode, we selected the mixture of Na 2 S and NaOH as the hole scavenger. Furthermore, the addition of NaOH to Na 2 S solution could inhibit the hydrolysis of S. − A 300 W xenon lamp (PLS-SXE300D, AM 1.5G) was used as the light source with an intensity of 100 mW·cm –2 to simulate sunlight. All electrochemical tests in this work were performed using a CHI920D electrochemical workstation.…”

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Zn₃In₂S₆/TiO₂ Nanocomposites for Highly Efficient Photocathodic Protection to Carbon Steel

Zhang

et al. 2022

ACS Appl. Nano Mater.

View full text Add to dashboard Cite

Photocathodic protection has evoked great attention in stainless steel protection; however, it has not been fully studied on carbon steel. This study has prepared a series of TiO 2 /Zn 3 In 2 S 6 nanocomposite films by combining anodic oxidation with hydrothermal methods, in which composition and morphology together with optical properties have been characterized. This heterojunction TiO 2 /Zn 3 In 2 S 6 has allowed access to visible-light absorbance. Photoelectrochemical tests suggest that this film can supply effective photocathodic protection to carbon steel. The maximum photogenerated potential drop achieved on TiO 2 / Zn 3 In 2 S 6 -30 coupled to carbon steel is about −0.49 V even after 80 h of illumination, and the corresponding photocurrent is 1.91 mA•cm −2 , which is about 5 times higher than that of pure TiO 2 . This is benefited from the effective photogenerated charge separation by the built-in electric field in the heterojunction. The detailed mechanism has been discussed in the paper.

show abstract

Section: Methodsmentioning

confidence: 99%

“…The marine atmosphere is harsh to the service equipment, so it is necessary to develop long-term corrosion prevention technology. − Corrosion resistance coating and cathodic protection are usually applied independently. − …”

Section: Introductionmentioning

confidence: 99%

Zn₃In₂S₆/TiO₂ Nanocomposites for Highly Efficient Photocathodic Protection to Carbon Steel

Zhang

et al. 2022

ACS Appl. Nano Mater.

View full text Add to dashboard Cite

show abstract

“…One is to use ordinary high-strength steel with coating or sacrifice cathode, which requires regular maintenance and relatively high cost for the long term. [6][7][8] The other is use stainless steel with high alloy composition. At present, highstrength stainless steel for marine engineering often contains a large amount of strategic resource nickel, which will increase the cost.…”

Section: Introductionmentioning

confidence: 99%

Investigation of the Role of Nitrogen in Cr18Mn15Mo1.5N Marine Steel

Liu

Zhao

Zhang

et al. 2022

steel research int.

View full text Add to dashboard Cite

A new high-nitrogen steel (Cr18Mn15Mo1.5N) with a nitrogen content of 0.54% for marine engineering is prepared using a vacuum induction furnace and remelting furnace. The effects of nitrogen on the microstructure, yield strength, yield ratio, elongation, and corrosion resistance are studied by holding the experimental steel at 800, 900, 1000, 1100, and 1200 C for 1, 3, and 5 h, respectively, which are compared with 316 steel series. The results of solution treatment show that the second phase includes Cr 2 N precipitates at 800 and 900 C, the second phase dissolves at 1000 and 1100 C, and ferrite precipitates at 1200 C, respectively. The yield strength of Cr18Mn15Mo1.5N steel is 2.5 times that of 316 steel, and the plasticity is equivalent. The corrosion resistance of the experimental steel treated at 1100 C for 1 h is 7.94 times better than that of 316 steel.

show abstract

“…Thus, the design and application of a cathodic protection system has to be implemented to guarantee adequate corrosion prevention of the submerged metallic structure. Nevertheless, many efforts are still necessary for improving the protection efficiency of marine ships [ 9 ].…”

Section: Introductionmentioning

confidence: 99%

“…Several materials have been tested for CP applications and showed positive results. Among them, aluminum alloys, such as Zn-Al-Cd and Al-Zn-I, provide acceptable performances, as widely reported in the literature [ 9 ]. The Al-based alloys have higher capacities (up to 2400 Ah/kg) than Zn-based alloys (780 Ah/kg).…”

Section: Introductionmentioning

confidence: 99%

A Critical Analysis on the Current Design Criteria for Cathodic Protection of Ships and Superyachts

et al. 2022

View full text Add to dashboard Cite

Classification Society and ISO standard regulate the design of cathodic protection (CP) plans of ships and superyachts. However, due to shipyards’ long experience, the hull vessel protection plans often rely on an adaptation of previous CP designs for similar ships. This simple practice could expose ships to low protection or overprotection. Here, the protection plan of an existing 42 m superyacht is considered to highlight critical CP design issues. The numerical analysis gives evidence of discrepancies between the CP design proposed in accordance with ISO standard and the protection plan that was actually implemented. Indeed, for a proper protection plan, the anode weight according to the ISO standard is 2.7 kg, whereas the real protection plan uses a 7 kg anode. The numerical optimization highlights an optimal anode mass of 5 kg (−28.5% in weight). It provides sufficient protection for the expected lifetime, and will preserve the system in cases of damage to the hull and a consequent increase in the breakdown factor. This new solution underlines the importance and necessity of improving cathodic protection plan design.

show abstract

Challenges and solutions of cathodic protection for marine ships

Cited by 42 publications

References 46 publications

Zn₃In₂S₆/TiO₂ Nanocomposites for Highly Efficient Photocathodic Protection to Carbon Steel

Zn₃In₂S₆/TiO₂ Nanocomposites for Highly Efficient Photocathodic Protection to Carbon Steel

Investigation of the Role of Nitrogen in Cr18Mn15Mo1.5N Marine Steel

A Critical Analysis on the Current Design Criteria for Cathodic Protection of Ships and Superyachts

Contact Info

Product

Resources

About

Challenges and solutions of cathodic protection for marine ships

Cited by 42 publications

References 46 publications

Zn3In2S6/TiO2 Nanocomposites for Highly Efficient Photocathodic Protection to Carbon Steel

Zn3In2S6/TiO2 Nanocomposites for Highly Efficient Photocathodic Protection to Carbon Steel

Investigation of the Role of Nitrogen in Cr18Mn15Mo1.5N Marine Steel

A Critical Analysis on the Current Design Criteria for Cathodic Protection of Ships and Superyachts

Contact Info

Product

Resources

About

Zn₃In₂S₆/TiO₂ Nanocomposites for Highly Efficient Photocathodic Protection to Carbon Steel

Zn₃In₂S₆/TiO₂ Nanocomposites for Highly Efficient Photocathodic Protection to Carbon Steel