Quantitative Understanding of the Environmental Effect on B10 Copper Alloy Corrosion in Seawater

Aluminium alloys have been integral to numerous engineering applications due to their favourable strength, weight, and corrosion resistance combination. However, the performance of these alloys in coastal environments is a critical concern, as the interplay between fracture toughness and fatigue crack growth rate under such conditions remains relatively unexplored. This comprehensive review addresses this research gap by analysing the intricate relationship between fatigue crack propagation, fracture toughness, and challenging coastal environmental conditions. In view of the increasing utilisation of aluminium alloys in coastal infrastructure and maritime industries, understanding their behaviour under the joint influences of cyclic loading and corrosive coastal atmospheres is imperative. The primary objective of this review is to synthesise the existing knowledge on the subject, identify research gaps, and propose directions for future investigations. The methodology involves an in-depth examination of peer-reviewed literature and experimental studies. The mechanisms driving fatigue crack initiation and propagation in aluminium alloys exposed to saltwater, humidity, and temperature variations are elucidated. Additionally, this review critically evaluates the impact of coastal conditions on fracture toughness, shedding light on the vulnerability of aluminium alloys to sudden fractures in such environments. The variability of fatigue crack growth rates and fracture toughness values across different aluminium alloy compositions and environmental exposures was discussed. Corrosion–fatigue interactions emerge as a key contributor to accelerated crack propagation, underscoring the need for comprehensive mitigation strategies. This review paper highlights the pressing need to understand the behaviour of aluminium alloys under coastal conditions comprehensively. By revealing the existing research gaps and presenting an integrated overview of the intricate mechanisms at play, this study aims to guide further research and engineering efforts towards enhancing the durability and safety of aluminium alloy components in coastal environments.

Section: Corrosion Simulationmentioning

confidence: 99%

Fracture Behaviour of Aluminium Alloys under Coastal Environmental Conditions: A Review

Alqahtani,

Starr,

Khan

2024

“…Copper heat exchangers usually operate at room temperature to about 80 • C. Water temperature is an important factor for the corrosion resistance of copper pipes. There are many reports about the influence of temperature on the corrosion behavior of copper [6][7][8][9]. Rahman et al [7] studied the corrosion of copper heat exchangers in river water and seawater at different temperatures for 30 d. They found that the corrosion rate and ion conductivity increase with the solution temperature from 20 to 80 • C. Ren et al [8] studied the effect of dissolved oxygen in tap water on copper corrosion under temperatures of 30 to 50 • C. The increase in temperature results in a lower oxygen solubility and a larger oxygen diffusion coefficient, which produces the highest corrosion rate at about 40 • C for copper.…”

Section: Introductionmentioning

confidence: 99%

“…Rahman et al [7] studied the corrosion of copper heat exchangers in river water and seawater at different temperatures for 30 d. They found that the corrosion rate and ion conductivity increase with the solution temperature from 20 to 80 • C. Ren et al [8] studied the effect of dissolved oxygen in tap water on copper corrosion under temperatures of 30 to 50 • C. The increase in temperature results in a lower oxygen solubility and a larger oxygen diffusion coefficient, which produces the highest corrosion rate at about 40 • C for copper. Cai et al [9] reported that the corrosion rate of the copper alloy B10 in seawater noticeably decreases with the change in temperature from 25 to 60 • C due to the reduction in dissolved oxygen by about 39%. Lytle et al [6] found that the copper pipelines of their testing community showed pitting leakage in cold water, but almost no leakage in hot water.…”

Section: Introductionmentioning

confidence: 99%

Effect of Temperature and NaClO on the Corrosion Behavior of Copper in Synthetic Tap Water

Sun,

Zhang,

Chen

et al. 2024

The corrosion behavior of copper was investigated in synthetic tap water with and without sodium hypochlorite (NaClO) at different temperatures during immersion for 70 d by using scanning electron microscopy (SEM), X-ray diffraction (XRD), and electrochemical measurement techniques. The weight loss corrosion rate and pit depth of copper first increase and then decrease with the change in solution temperature from 25 to 80 °C. This is mainly related to the corrosion products formed on the copper surface. The main corrosion products change from Cu2O and Cu2(OH)2CO3 to CuO with the increase in solution temperature. The presence of 3 ppm NaClO slightly increases the weight loss corrosion rate and pit depth of copper under all temperatures except for 50 °C and reduces the temperature of the maximum corrosion rate from 50 to 40 °C. Free chlorine reduction accelerates the cathodic reaction of the corrosion process.

“…The exploitation of marine resources is inseparable from marine equipment, meaning that a large number of metal materials need to serve in the marine environment [1][2][3]. As we all know, there are many kinds of inorganic salts in seawater with an average salinity of 35, which makes seawater a natural strong electrolyte [4][5][6][7]. Therefore, metal materials often suffer serious corrosion in the marine environment.…”

Section: Introductionmentioning

confidence: 99%

Effect of Dissolved Oxygen Content on Tribo-Corrosion Behavior of Monel 400 Alloy in Seawater

Zhu,

Wang,

Liu

et al. 2023

When serving in the marine environment, the corrosion of metals is inevitably affected by marine environmental factors, especially dissolved oxygen. This will affect the service life of metal in the marine environment. In this paper, a friction- and wear-testing machine, an electrochemical workstation, and a dissolved oxygen/temperature control system are employed to systematically study the influence of dissolved oxygen (DO) content on the tribo-corrosion characteristics of Monel 400 alloy in seawater. The results show that the DO content has a remarkable effect on the tribo-corrosion behavior of Monel 400 alloy. The corrosion of Monel 400 alloy increases with the increase in DO content, leading to the thickness of corrosion product increasing at higher DO contents. The corrosion product is mainly composed of Ni(OH)2, Cu2O, CuO, and Cu(OH)2. While the corrosion of Monel 400 alloy further affects the wear rate of the alloy, when the corrosion is inhibited, the change of DO content has no effect on the wear rate of Monel 400 alloy. In addition, the inhibition influence of corrosion on mechanical wear is found, which is attributed to the excellent lubrication performance of corrosion products.