Material characteristics metastable conditions

In the simple case of free-standing electrodeposits, or deposits that completely cover the substrate, the corrosion behavior may be characterized by the standard procedures described in Sections HI and IV of this manual. As with materials produced 1 other means, the corrosion performance of the deposit may be expected to be a sensitive function of the composition and microstructure, which are determined by the processing conditions. Interestingly, electrochemical deposition may be used to generate a variety of novel metastable materietls. The deposition of certain metallic glasses or supersaturated single-phase materials offers the promise of remarkable corrosion resistance. For example, electrodeposited Ni Cr P metallic glass has been shown to exhibit corrosion characteristics superior to Hastelloy C-276 (Fig. 1) [/]. The nature of the p>assive film formed on Ni-Cr-P metallic... 

---