When planning oil wells with stainless steel components, two possible reasons for depassivation have to be considered-chemical depassivation caused by acidizing jobs and mechanical depassivation caused by various tools and hard particles. The study explores conditions causing chemical activation of investigated steels and circumstances under which repassivation occurs after activation. The main focus of the study is to determine, how quickly various steels can repassivate under different conditions and to find pH values where repassivation will occur after depassivation. The investigated steels were ferritic (martensitic or bainitic) in the cases of 13Cr, 13Cr6Ni2Mo, and 17Cr4Ni2Mo, austenitic in the case of 17Cr12Ni2Mo, and duplex (austenitic and ferritic) in the case of 22Cr5Ni3Mo. Potentiodynamic experiments were employed to obtain electrochemical properties of investigated steels, followed by immersion tests to find ultimate conditions, where the steels still retain their passivity. After obtaining this information, scratch tests were performed to study the repassivation kinetics. It was found that repassivation times are similar for nearly all investigated steels independent of their chemical composition and microstructure.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6926990 | PMC |
| http://dx.doi.org/10.3390/ma12233811 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Investigation of commercial cut-resistant gloves claiming graphene additive content.
Graphene 2D Mater
June 2024
NanoSafe, Inc., Blacksburg, VA 24060, USA.
Five commercially available cut-resistant gloves were sourced from four different worldwide manufacturers which were advertised to contain graphene. A method was developed to assess the fibers composing each glove, including dissolution of the constituent fibers using sulfuric acid or liquid paraffin at elevated temperature, to extract and analyze particle additives. Scanning electron microscopy with energy-dispersive X-ray spectroscopy was applied to fibers and extracted particles for morphological and elemental analysis; Raman spectroscopy was applied to discern the composition of carbonaceous materials for the ultimate purpose of identifying any graphenic additives.
View Article and Find Full Text PDFUltrasmooth Micromilling of Stainless Steel by Ultrashort Pulsed Laser Ablation Using MHz Bursts.
ACS Appl Mater Interfaces
January 2025
Department of Advanced Production Engineering, Engineering and Technology Institute Groningen, Faculty of Science and Engineering, University of Groningen, Nijenborgh 4, Groningen, 9747 AG, The Netherlands.
Ultrashort pulsed (USP) laser burst ablation has attracted numerous interests for its great potential in enhancing ablation efficiency and reducing the heat-affected zone. However, little attention has been paid to the influence of burst ablation on the processed surface quality. To fill this research gap, the present study conducts a comprehensive investigation on the surface processing of stainless steel using ultrashort pulsed laser burst ablation.
View Article and Find Full Text PDFWork conditions and determinants of health status among industrial shift workers: a cross-sectional study.
Front Public Health
January 2025
Department of Movement and Training Science, University of Wuppertal, Wuppertal, Germany.
Introduction: This study investigated potential health status differences among forging, manufacturing, and logistics workers.
Methods: We included 403 participants (age: 41 ± 12 years) from a medium-sized steel company (forge: 64, manufacturing: 299, logistics: 99). Health status was multifactorial assessed: (1) Frequency of musculoskeletal complaints (German Pain Questionnaire).
Visual Stimulus Materials Used in Spoken Narrative Discourse Elicitation After Traumatic Brain Injury: A Scoping Review.
Am J Speech Lang Pathol
January 2025
The University of Sydney, New South Wales, Australia.
Purpose: Management of discourse is acknowledged as a critical component of speech-language pathology practice with cognitive communication after traumatic brain injury (TBI). This scoping review aimed to collate the visual materials that are being used in empirical research for spoken narrative elicitation post-TBI, in both assessment and treatment contexts. We aimed to examine the format, structure, and sources for visuals used.
View Article and Find Full Text PDFMechanistic Insights into the Eco-Friendly Conifer Cone Extract's Corrosion Inhibition on Steel Rebar and Cement Mortar: An Experimental and Simulation Approach.
Langmuir
January 2025
Department of Robotics Engineering, Hanyang University, 55 Hanyangdaehak-ro, Ansan, Gyeonggi-do 15588, Republic of Korea.
This study investigates the corrosion inhibition effects of eco-friendly conifer cone extract (CCE) on steel rebars embedded in cement mortar exposed to 3.5% NaCl under alternate wet/dry cycles. CCE concentrations of 0, 0.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!