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Types of Corrosion in the Offshore Environment
Published in Karan Sotoodeh, Coating Application for Piping, Valves and Actuators in Offshore Oil and Gas Industry, 2023
Crevice corrosion refers to a localized attack on a metal surface at or near the gaps and crevices between two jointing surfaces. The gap or crevice can be formed between two metals or between a metal and a soft or non-metal material. Crevice corrosion occurs in areas where the fluid becomes trapped, such as under gaskets, washers, insulation materials, fastener heads, threaded connections, etc. Different types of compounds can get trapped in crevices inside piping systems, such as corrosive fluid, dirt, mud, biofouling and other types of deposits. Fouling organisms or biofouling refers to animals or plant species that live in water and can adhere to the surface of materials used in water.
Durability
Published in Raymond Cheung, Ken Ho, Soil Nailing, 2021
According to Barley & Mothersille (2005), Grade 304S31 and 316S31 stainless steels are commonly used and readily available for geotechnical applications, which offer an economic combination of performance and life cycle costing. These are available in most types of tendons and coarse threaded bars that are suitable for use in soil nails. One should note that localized corrosion is most likely to take the form of pitting or crevice corrosion in stainless steel. The risk will generally increase with increasing chloride concentration in the ground and decreasing alloy content.
Corrosion, Wear, and Degradation of Materials
Published in Mahmoud M. Farag, Materials and Process Selection for Engineering Design, 2020
Crevice corrosion occurs under gaskets, rivets, and bolts and under porous deposits. This type of corrosion is called poultice corrosion when it occurs beneath the shielded areas caused by mud splashes and road debris thrown by motorcar tires on the underside of the fenders and other parts of the car body. Crevice corrosion occurs in many metallic materials including carbon and stainless steels and titanium, aluminum, and copper alloys.
Characteristics and strength of hybrid friction stir welding and adhesive bonding lap joints for AA2024-T3 aluminium alloy
Published in The Journal of Adhesion, 2022
Yue Wang, Peng Chai, He Ma, Yanhua Zhang
The tips of the curved hook and cold lap defect become the stress concentration regions of the joint under external load. Furthermore, the corrosion media in the air can easily enter the weld through the gap at the lap interface, and the stress concentration regions are further deteriorated. Due to the high risk of crevice corrosion in FSW lap joints, the FSW technology is limited in the lap structures. The crevice corrosion refers to the local corrosion that occurs near the slit or gap formed on the metal surface with other metal surfaces or non-metallic surfaces.[6] For FSW lap structures, with the increase of the service time, stress concentration regions (the tips of hook tip and cold lap defect) at the lap interface directly become the high incidence zones of crevice corrosion.