Effect of Alloying Tin on the Corrosion Characteristics of Austenitic Stainless Steel in Sulfuric Acid and Sodium Chloride Solutions

Abstract

The effect of tin on general and pitting corrosion behaviors of the austenitic stainless steel in sulfuric acid and sodium chloride solutions was investigated by potentiostatic critical pitting temperature, cyclic potentiodynamic polarization, electrochemical impedance spectroscopy, and scanning electron microscopy. The results showed that there is an optimal tin addition which is around (0.062-0.1) wt%, and the general corrosion resistance of B316LX with 0.08 wt% tin addition in boiling H 2 SO 4 increased remarkably with a corrosion rate of an order of magnitude lower than that of 316L. Hydrolyzation of tin ions induces more metastable pit occurrence on the material surface. However, the pitting resistance of B316LX increases because tin oxides improve the density and uniformity of the passive film, and hydroxide and oxide of tin inhabit the process of pit growing. The effect of tin on pitting corrosion process is illustrated schematically.

Effect of tin addition on the corrosion resistance of low‐alloyed steel in simulated coastal‐industrial atmosphere environment

“…This shows that the increase in tin content has a certain deteriorating effect on the stability and compactness of the rust layer. At the same time, the copper element contained in the steel may inhibit the above-mentioned reactions ( 9) and (10), promote the reactions ( 7) and ( 8), and offset the deteriorating effect of tin to a certain extent [45,52,53]. In turn, it plays a decisive role in slowing down atmospheric corrosion.…”

Anodic Dissolution Behavior of Zirconium in n-Butanol Solutions Containing Buⁿ₄NBr

“…This response is interpreted as when the potential is just below the stable pit nucleation potential, unstable pitting exists as a result of repetitive new pit formation and repassivation in the early stage, which leads to the oscillation in steady-state current density. 14,28 The results indicate that the steady-state pitting potential E b (i.e., the minimum potential required for stable pit initiation and growth) is between 1.55-1.60 V vs. SCE. Figure 3 shows the SEM images of the electrode surface anodized for 10 min at various potentials.…”

Enhancement in intergranular corrosion resistance of the stabilised ultra-pure 430LX ferritic stainless steel by tin addition

“…The Cr 2p 3/2 spectrum is fitted with three peaks, including the Cr met (574.3 eV), Cr 2 O 3 (576.2 eV) and Cr(OH) 3 (577.6 eV). These oxidised species are the primary constituents in the passive film of FSSs [12,34,35].…”