A5090324309- Corrosion Behavior and Inhibition
- Magnetic Properties of Alloys
- Concrete Corrosion and Durability
- Hydrogen embrittlement and corrosion behaviors in metals
- Magnetic Properties and Applications
- Superconducting Materials and Applications
- Orthopaedic implants and arthroplasty
- Advanced materials and composites
- High-Temperature Coating Behaviors
- Analytical Chemistry and Sensors
- Hydrogen Storage and Materials
- Electrochemical Analysis and Applications
- Concrete and Cement Materials Research
- Metallurgy and Material Science
- Metal and Thin Film Mechanics
- Magnetic properties of thin films
- Metal Alloys Wear and Properties
- Magnesium Oxide Properties and Applications
- Electric Motor Design and Analysis
- Building materials and conservation
- Lubricants and Their Additives
- Structural Integrity and Reliability Analysis
- Aluminum Alloys Composites Properties
- Radioactive element chemistry and processing
- Advanced Photocatalysis Techniques
VTT Technical Research Centre of Finland
2018-2023
Tampere University
2012-2016
Stainless steels are widely used in industrial assets and equipment. Despite their good corrosion resistance under a wide range of operating conditions, there is the possibility pitting presence chlorides. However, very few studies have identified safe conditions for various high-alloyed stainless steel grades by comparing susceptibility. In this research, susceptibility to attack five with austenitic duplex microstructures was examined dilute sulphuric acid solution varying amounts NaCl at...
Synchrotron high-energy XRD measurements and ab-initio DFT calculations were employed to investigate microstructural degradation of copper upon exposure sulfide-containing anoxic groundwater simulating nuclear waste repository. After two-month exposure, the revealed heterogeneous lattice deformation in microstructure expansion near-surface regions. The show that sulfur promotes hydrogen adsorption on copper. Water causes surface reconstruction insertion into microstructure, occurring via...
ToF-SIMS analysis of copper samples after exposures to simulated groundwater with and without sulfide addition was performed investigate the penetration corrosive species containing H, S, O, Cl, into copper. Depth profiles show extent 2D/3D images reveal local elemental distribution at different depths inside Pre-oxidation did not reduce while additional in exposure 60 °C significantly promoted penetration. The demonstrates need for risk assessment complex corrosion forms such as...
This study investigates the corrosion behavior of three stainless steel grades at two H2SO4 concentrations, namely 1 wt% and 10 wt%, with varying NaCl concentrations in range from 500 mg/L to 10,000 mg/L. Dissociation sulfuric acid yields hydrogen (H+) sulfate () ions, former which lowers pH value a solution while latter increases concentration ions that act as inhibitor. The equilibrium chemistry solutions was defined test temperatures 22°C, 50°C, 90°C, 130°C, correlated observations on...
Surface films formed on pre-oxidized copper in anoxic simulated groundwater with sulphide were characterized by field emission gun scanning electron microscopy (FEG-SEM), Fourier transform infrared spectroscopy (FT-IR), open circuit potential (OCP) measurements, and via analysing the water chemistry weight changes specimens. Additionally, developed under identical conditions ground specimens glow discharge optical (GDOES). The results revealed that content significantly influences...
In Finland, the repositories for low and intermediate-level radioactive waste (LLW ILW) will be situated at three different geographical locations in about 60 to 100 m deep granite bedrock where containers can subjected anoxic groundwater containing microbes. The composition of varies terms chemistry microbial activity locations. this study, from repository areas was analyzed respect community. Corrosion tendency steel grades, carbon AISI/SAE 1005 stainless steels AISI 304 316L, studied...
Sintered neodymium-iron-boron (Nd-Fe-B) magnets with cube and flat geometries were exposed to pressurized heat-humidity corrosion tests for 96 240 h. Measurements of weight flux losses performed after the tests. The corroded specimens further characterized using scanning electron microscopy optical profilometry. microcrystalline anisotropy sintered gave rise heterogeneous corrosion, where pole faces degraded preferentially side faces. magnetic field from magnet itself thus contributed amount...
Sintered Nd-Fe-B magnets are critical components in permanent magnet wind generators. They the strongest available and thus enable construction of light effective devi...