The mechanism of erosion-corrosion of API X65 steel under turbulent slurry flow: Effect of nominal flow velocity and oxygen content

被引：42

作者：

Aguirre, Javiera ^{[1
]}

Walczak, Magdalena ^{[1
]}

Rohwerder, Michael ^{[2
]}

机构：

[1] Pontificia Univ Catolica Chile, Dept Mech & Met Engn, Escuela Ingn, Santiago, Chile

[2] Max Planck Inst Eisenforsch GmbH, Dusseldorf, Germany

来源：

WEAR | 2019年 / 438卷

关键词：

Erosion-corrosion; API 5L X65 steel; Erosion-enhanced corrosion; EBSD; IMPACT ANGLE; CARBON-STEEL; SAND CONCENTRATION; PARTICLE-VELOCITY; SURFACE-HARDNESS; STAINLESS-STEELS; PURE METALS; WEAR; RESISTANCE; PERFORMANCE;

D O I：

10.1016/j.wear.2019.203053

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

Erosion-corrosion (E-C) of carbon steel API 5L X65 by mineral quartz and alumina slurry is studied to understand the mechanism of corrosion-accelerated material's degradation. A rotating cylinder electrode is employed to simulate the E-C damage and for electrochemical characterization, observed at different flow velocities and contents of dissolved oxygen (DO). Microstructural inspection using SEM and EBSD reveals the extension of the work-hardened layer and other features of the sub-surface. The effect of nominal flow velocity is shown to be associated with an increment in average particles' impact angle and frequency of impacts at the faster flow. The increase in DO availability is shown to promote localized-type corrosion different from pitting, demonstrating the mechanism of erosion-enhanced corrosion.

引用

页数：14

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