Corrosion Behavior of AISI 316L Stainless Steel Used as Inner Lining of Bimetallic Pipe in a Seawater Environment

Abstract

Seawater leakage commonly leads to corrosion in the inner lining of submarine bimetallic pipes, with significant financial implications for the offshore oil and gas production industry. This study aims to improve understanding of the performance of bimetallic pipes by investigating the corrosion behaviors of mechanically bonded 316L stainless steel. Immersion experiments were conducted in a seawater environment, under both atmospheric conditions and high temperature and high pressure conditions, and corroded surfaces were examined using scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDS) to reveal micromorphology and elementary compositions. The results demonstrated that the corrosion rates of the bonded 316L specimen were between 5% and 20% higher than those of specimens without bonding under atmospheric conditions. This is attributed to the stress cracking that occurs during corrosion. Under high temperature and high pressure conditions, the corrosion rates were remarkably increased (91% to 135%) and the corrosion process took longer to reach equilibrium. This may be attributed, firstly, to the products becoming increasingly porous and weak, and also to the fluid stress caused by stirring in these experiments to simulate seawater movement.

Improvement of Corrosion and Wear Resistance of CoCrNiSi0.3 Medium-Entropy Alloy by Sputtering CrN Film

“…In Figure 4 , a passivation behavior occurs for every specimen during the corrosion process. For as-rolled specimens, the high-strain grains and boundaries accompanied by high residual stress are prone to severely corroding [ 36 , 37 , 38 , 39 ]. Consequently, the as-rolled specimen has the highest corrosion current density, 470.72 μA·cm −2 , and the lowest polarization impedance of 98.82 Ω·cm 2 , showing the worst corrosion performance.…”

The Influence of Temperature on Degradation of Oil and Gas Tubing Made of L80-1 Steel

“…The rate of metal dissolution on the anode is very high, resulting in perforation in a very short amount of time, without a bigger mass loss outside the attacked place [33]. The pitting corrosion of steel occurs most frequently in water environments containing halide ions, i.e., chlorine, bromine, or iodine ions, where its intensity mainly depends on temperature and the concentration of ions [34]. It usually occurs on any internal inhomogeneities of the metal (non-metallic inclusions, precipitations, deformations), as well as on external inhomogeneities (edges, scratches, indentations, remnants of scale, deposits, etc.).…”

Additive Manufacturing of AISI 316L Stainless Steel: A Review

“…Considering also both onshore and offshore marine applications, AISI 316L stainless steel has played an important role in fabricating thousands of tonnage marine structures and machinery successfully over the past few decades [189]. Materials like that are mainly used in the fabrication of offshore oil and gas pipelines [190][191][192][193], offshore ocean mining machinery [194,195], chemical tankers in ships [196,197], as well as in architecture offshore environments like the construction of bridges in cold countries. The recent trends regarding Battery Electric Vehicle (BEV) and fuel cells make AISI 316L also suitable for automotive applications [198,199].…”