論文
FeCl2水溶液からの人工β-FeOOHさび粒子の生成におよぼすMo5+の影響
キーワード:
Artificial β-FeOOH rust,
Molybdenum,
Atmospheric Corrosion,
Rust formation,
Particle morphology
2021 年 58 巻 10 号 p. 546-551
詳細
2021 年 58 巻 10 号 p. 546-551
To simulate the atmospheric corrosion of Mo-alloying steels in salinity environment, artificial β-FeOOH rust particles were synthesized by aerial oxidation of a mixture of aqueous FeCl2 and MoCl5 solutions at different Mo/Fe molar ratios. Increasing Mo/Fe ratio suppressed the β-FeOOH formation to generate amorphous materials. Added Mo5+ was easily incorporated in the products and remarkably inhibited the crystallization and particle growth of β-FeOOH. Specific surface area of the Mo5+-doped β-FeOOH steeply decreased with an increment of Mo/Fe ratio, meaning the strong aggregation of β-FeOOH particles by adding Mo5+. It is likely, therefore, that atmospheric corrosion of Mo-alloying steels in salinity environment forms the dense, compact and stable rust layer consisting of fine β-FeOOH rust particles on the steel to prevent further corrosion of the steel.
