Michele L. Ostraat

Steel Corrosion Mechanisms during Pipeline Operation: In Situ Characterization

Pipeline corrosion continues to present challenges to the oil and gas industry, with billions of dollars being spent annually to remediate, repair, and replace steel piping. The corrosion processes of this piping are not well understood, due in part to the seemingly endless environmental and industrial parameters involved in corrosion of the steel. We have applied a nanoscale approach to investigate the initial oilfield corrosion pathways, formation products, and susceptible grain structures of low-alloy carbon steel through the course of corrosion by hydrogen sulfide (H2S) and carbon dioxide (CO2). The goal of the project is to develop a mechanistic understanding of the early onset of corrosion under wellcontrolled environmental conditions in order to develop future strategies to reduce corrosion-related losses. The most aggressive component in these operations is caused by CO2 attack on the steel surface, where an aqueous phase present provides the electrolyte needed for corrosion to occur [1]. Though it is postulated that grain boundaries, material defects, and nanoscale features are likely sites for this mesatype corrosion, predictive relationships have not been adequately demonstrated.

Data on dielectric strength heterogeneity associated with printing orientation in additively manufactured polymer materials

The following data describe the dielectric performance of additively manufactured polymer materials printed in various orientations for four common additive manufacturing techniques. Data are presented for selected commercial 3D printing materials fabricated using four common 3D printing techniques: Stereolithography (SLA), Fused Deposition Modeling (FDM), Selective Laser Sintering (SLS), and Polymer Jetting (PolyJet). Dielectric strengths are compiled for the listed materials, based on the ASTM D139 standard. This article provides data related to “Dielectric Strength Heterogeneity Associated with Printing Orientation in Additively Manufactured Polymer Materials” [1].

Understanding Commonalities and Interplay Between Organotemplate‐Free Zeolite Synthesis, Hierarchical Structure Creation, and Interzeolite Transformation

Zeolites are crystalline microporous materials that have been widely used in many applications related to industrial catalysis, ion‐exchange, and adsorption. In recent years, there has been a growing emphasis on the development of green chemistry toward more sustainable zeolite synthesis routes. Considerable efforts have been devoted to identifying alternative approaches in order to reduce the negative impacts of organic templates. This review will focus on the significant progress achieved during the past decade on the development of novel organotemplate‐free strategies through three distinctive topics, i. e. zeolite synthesis, hierarchical zeolite synthesis, and interzeolite transformation. The progress of each topic will be documented, followed by a summary of the intriguing commonalities and interplay among these approaches. The insights into the mechanism and interplay leading to different zeolite materials will enable us to understand the requirements for designing novel zeolite catalysts and catalyst supports in an organotemplate‐free environment that are likely to further enhance the industrial impact of these materials in the future. We conclude this article with a perspective and outlook focusing on current trends and future directions in this area.