We study the corrosion behavior of bright nickel coatings in the vapor of concentrated acetic acid. Deposits with a sulfur content of 0.25 wt.% are obtained from electrolytes intended for bright nickel plating with an admixture of saccharin (5 g/dm3). It is shown that their potentials vary within the range [(–0.02)–(– 0.01) V]. Moreover, it is demonstrated that, in the course of holding of these nickel deposits in the vapor of acetic acid, the amount of sulfur on the metal surface gradually increases and reaches 3.32 wt.%. It is established that the sulfur content of the film of black-color corrosion products formed after holding in the vapor for 24 h is close to 22 at.% and corresponds to nickel sulfide.

中文翻译：

---

光亮镍涂层在醋酸蒸气中的耐腐蚀性

我们研究了光亮镍涂层在浓醋酸蒸气中的腐蚀行为。硫含量为 0.25 wt.% 的沉积物是从用于光亮镍电镀的电解液中获得的，其中混合了糖精 (5 g/dm3)。结果表明，它们的电位在 [(–0.02)–(–0.01) V] 范围内变化。此外，还表明，在将这些镍沉积物保持在乙酸蒸气中的过程中，金属表面的硫含量逐渐增加并达到 3.32 wt.%。确定在蒸气中保持 24 小时后形成的黑色腐蚀产物膜的硫含量接近 22 at.%，对应于硫化镍。