1. Effects of oyster as macrofouling organism on corrosion mechanisms of a high-strength low-alloy steel.
- Author
-
Wang, Zhengquan, Huang, Yanliang, Wang, Xiutong, Xu, Yong, and Cai, Fanfan
- Subjects
- *
LOW alloy steel , *OYSTERS , *SEAWATER corrosion , *ANAEROBIC bacteria , *STEEL corrosion , *FREE radicals - Abstract
Adhered oysters can cause complex corrosion of fouled steel structures, with localized crevice corrosion being the most severe. A crevice corrosion model of steel caused by oysters is proposed, showing that oyster secretions can penetrate into the oyster/steel interface and act as a stabilizer of the rust layer, enabling tight attachment and thereby slowing the metal corrosion rate. In contrast, oxygen concentration cells, enriched Cl-, anaerobic bacteria, the presence of organic free radicals and oxidative cross-linking during the curing process of oyster secretions act as localized corrosion accelerators facilitating the crevice corrosion process in the oyster/steel gap. [Display omitted] • Adhered oysters could cause severe localized crevice corrosion of fouled steel structures. • Oyster secretions could act as a stabilizer of the rust layer. • Synergistic effects of fouling and inorganic factors acted as localized corrosion accelerators. • The proliferation of anaerobic bacteria enhanced the corrosion in the crevice. • Oyster influenced marine corrosion model was proposed. [ABSTRACT FROM AUTHOR]
- Published
- 2022
- Full Text
- View/download PDF