Elizabeth Sikora

Corrosion Behavior of Nanocrystalline Bulk Al-Mg-Based Alloys

Abstract The corrosion behavior of a series of nanocrystalline Al-Mg alloys has been investigated and compared to that of conventional aluminum alloy 5083 (AA5083 [UNS A95083]). Experimental result...

Corrosion Protection Assessment of Barrier Properties of Several Zinc-Containing Coating Systems on Steel in Artificial Seawater

Abstract The present investigation assessed the corrosion protection performance of different Zn sacrificial coating system configurations during constant immersion in artificial seawater. Visual o...

The Role of Grain Boundary Regions in the Localized Corrosion of a Copper-Free 6111-like Aluminum Alloy

Abstract The localized corrosion behavior of a Cu-free 6111-like alloy was studied in solutions with different chloride concentrations. It was found that the alloy was susceptible to pitting and intergranular corrosion (IGC). The IGC attack on the alloy was less conspicuous unless the pits were cross sectioned. The pitting attack propagates via crystallographic tunneling regardless of the applied potential or heat treatment conditions. Scanning transmission electron microscopy (STEM)/x-ray microanalysis detected preferential segregation of Mg and Si at some high-angle grain boundaries (GB) and approximately 30-nm-wide Mg- and Si-depleted regions across GB of the alloy. Such findings have experimentally confirmed the assumptions made by others regarding the IGC susceptibility of 6XXX Al alloys, which was based on the noble GB precipitates and/or the preferential segregation of noble elements and adjacent solute-depleted regions. As a result, a link between the GB elemental profiles and the alloys IGC susc...

Comparison of Testing Techniques Used to Analyze the Corrosion Resistance of Sacrificial Coating Systems

Abstract The present investigation assessed the corrosion performance of 14 different Zn and Al sacrificial coating system configurations based on several different accelerated corrosion testing te...

A comparison of the corrosion response of zinc-rich coatings with and without presence of carbon nanotubes under erosion and corrosion conditions

Electrochemical impedance spectroscopy tests were conducted on carbon nanotubes (CNTs) enriched zinc-rich epoxy coating and a commercial zinc-rich coating. Coating performances were examined after ...