scholarly journals Brine-Induced Tribocorrosion Accelerates Wear on Stainless Steel: Implications for Mars Exploration

2021 ◽  
Vol 2021 ◽  
pp. 1-11
Author(s):  
Javier Martín‐Torres ◽  
María‐Paz Zorzano‐Mier ◽  
Erik Nyberg ◽  
Abhilash Vakkada-Ramachandran ◽  
Anshuman Bhardwaj
Keyword(s):  
Stainless Steel ◽  
Chemical Species ◽  
Support Surface ◽  
Martian Surface ◽  
Steel Material ◽  
Stainless Steel Material ◽  
Combined Action ◽  
Series Of Experiments ◽  
Robotic Missions ◽  
Human Exploration

Tribocorrosion is a degradation phenomenon of material surfaces subjected to the combined action of mechanical loading and corrosion attack caused by the environment. Although corrosive chemical species such as materials like chloride atoms, chlorides, and perchlorates have been detected on the Martian surface, there is a lack of studies of its impact on materials for landed spacecraft and structures that will support surface operations on Mars. Here, we present a series of experiments on the stainless-steel material of the ExoMars 2020 Rosalind Franklin rover wheels. We show how tribocorrosion induced by brines accelerates wear on the materials of the wheels. Our results do not compromise the nominal ExoMars mission but have implications for future long-term surface operations in support of future human exploration or extended robotic missions on Mars.

Tribocorrosion on Mars

2020 ◽  
Author(s):  
Javier Martin-Torres ◽  
Maria-Paz  Zorzano ◽  
Erik Nyberg ◽  
Abhilash Vakkada Ramachandran ◽  
Anshuman Bhardwaj
Keyword(s):  
Chemical Species ◽  
Support Surface ◽  
Martian Surface ◽  
Steel Material ◽  
Stainless Steel Material ◽  
Combined Action ◽  
Series Of Experiments ◽  
Robotic Missions ◽  
Human Exploration

Abstract Tribocorrosion is a degradation phenomenon of material surfaces subjected to the combined action of mechanical loading and corrosion attack caused by the environment. Although corrosive chemical species such as materials like chloride atoms, chlorides and perchlorates have been detected on the Martian surface, there is a lack of studies of its impact on materials for landed spacecraft and structures that will support surface operations on Mars. Here we present a series of experiments on the stainless-steel material of the ExoMars 2020 Rosalind Franklin rover wheels. We show how tribocorrosion induced by brines accelerate wear on the materials of the wheels. Our results do not compromise the nominal ExoMars mission but have implications for future long-term surface operations in support of future human exploration or extended robotic missions on Mars.

Application of the First Higher-Order (M21) Mode Rayleigh Wave to the Inspection of Stainless Steel Overlays

1990 ◽  
Vol 112 (3) ◽  
pp. 298-301 ◽  
Author(s):  
D. E. Bray
Keyword(s):  
Stainless Steel ◽  
Point Contact ◽  
Base Material ◽  
Higher Order ◽  
Inspection Method ◽  
High Frequencies ◽  
Steel Material ◽  
Welding Defects ◽  
Stainless Steel Material ◽  
Probe Placement

Efficient inspection of stainless steel overlays appears to present a particularly challenging problem due to the anisotropy that is characteristic of that material. An improved inspection technique may be available, however, when the dissimilar properties of the overlay and the base material are utilized. Higher order mode Rayleigh waves which at high frequencies remain confined to the upper layer of the stainless steel material are demonstrated to be able to detect welding defects in the overlay material in a field some distance away from the probe. With this technique, a larger area may be scanned with each probe placement rather than the point contact probe inspection method that is typically used.

Study of Magnetorheological Brush Finishing (MRBF) for Concave Surface of Conformal Optics

2012 ◽  
Vol 497 ◽  
pp. 170-175
Author(s):  
Yun Zhang ◽  
Jing Feng Zhi ◽  
Yue Wang Yu ◽  
Xu Xing Zhu ◽  
Wei Zuo
Keyword(s):  
Surface Roughness ◽  
Stainless Steel ◽  
Surface Damage ◽  
Aspheric Surface ◽  
Precision Turning ◽  
Good Surface ◽  
Steel Material ◽  
Stainless Steel Material ◽  
Ultra Precision ◽  
Magnetorheological Polishing

Stainless steel; Aspheric mould; Ultra-precision turning; Magnetorheological polishing The ultra precision turning and the inclined-axis type of magnetorheological polishing were introduced for the small aspheric mould of stainless steel. The method was based on the principle of two kinds of processing methods, and the processing feature of stainless steel material. Firstly, the ultra-precision turning was employed to shape aspheric surface rapidly and obtain a relatively good surface. And then, the inclined-axis type of magnetorheological polishing as the final finishing was used to decrease sub-surface damage to obtain better precision. Several of experiments were carried out, the experimental results show that surface roughness can be achieved for Ra 0.0073μm.

Process Optimization for Welding Stainless Steel Clad Material Based on Orthotropic Bridge Plates

2012 ◽  
Vol 178-181 ◽  
pp. 2066-2069 ◽  
Author(s):  
Ji Fang ◽  
Yong Zhi Li
Keyword(s):  
Stainless Steel ◽  
Railway Bridge ◽  
Welding Quality ◽  
Grass Roots ◽  
Steel Material ◽  
Stainless Steel Material ◽  
Under Construction ◽  
First Time ◽  
Welding Stainless Steel

Clad plates welding of stainless steel welding on interlayer between grass roots and the transition layer is a key technology.Structure and properties of welded joints is very uneven,and there have often welding repair cracks. Clad plates of stainless steel material is used to weld under construction in the Southern link’s railway bridge for the first time at home .However, there occurs welding warpage of the convex parts and roughness appears excessive on the overall clad plates and severe deformation, and the quality of railway bridge is affected seriously. Reasons of the impacting welding quality are analyzed and specific measures to control them are proposed and the construction program is optimized.the efficiency and quality of welding can be improved ,a good foundation for the compound plates welding is layed,it will be contribute to ensure the overall quality of the welding quality of railway bridge especially the use of clad plates.

scholarly journals Fatigue Crack Growth Studies on Narrow Gap Pipe Welds of Austenitic Stainless Steel Material

2014 ◽  
Vol 86 ◽  
pp. 203-208 ◽  
Author(s):  
Punit Arora ◽  
Saroj Kumar ◽  
P.K. Singh ◽  
V. Bhasin ◽  
R.K. Singh ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Fatigue Crack ◽  
Austenitic Stainless Steel ◽  
Fatigue Crack Growth ◽  
Crack Growth ◽  
Narrow Gap ◽  
Growth Studies ◽  
Steel Material ◽  
Stainless Steel Material

New Magnetron Sputtered Stainless Steel Nitride Cermet Solar Absorbing Coatings

2008 ◽  
Vol 55 ◽  
pp. 181-186
Author(s):  
Rei Cheng Juang ◽  
Yung Chin Yeh ◽  
Shiau Wei Chang ◽  
Wen Chieh Chen
Keyword(s):  
Stainless Steel ◽  
Theoretical Prediction ◽  
Gas Flow ◽  
Metal Composite ◽  
Nitrogen Gas ◽  
Solar Absorptance ◽  
Steel Material ◽  
Single Target ◽  
Stainless Steel Material ◽  
Reactive Gas

This paper presents a new method for sputtering solar selective absorber coatings. Radio frequency magnetron reactive sputtering created stainless steel/stainless steel nitride (SS/SS-N) cermet (ceramic-metal composite) thin films under varied nitrogen gas flow ratios. In this present study, a stainless steel material is used for one-target sputtering to manufacture a solar selective absorber film having good solar absorptance of 0.91 and low thermal emittance of 0.06. This sputtering process shows considerable and stable usefulness due to the anti-oxidation and single target. Optical constants n and k have been determined by spectroscopic ellipsometry for cermet composite in a reactive gas flow from 0 percent to 50 percent. Based on the nitrogen content of the film, we used a different oscillator to analyze the film. When the nitrogen gas flow reaches 10 percent, the sputtered film has a significant transformation from metal to cermet properties. When the nitrogen gas flow goes above 17.5 percent, then the film transforms to a dielectric film which can be an anti-reflection layer. A solar absorptance of 0.92 was accepted as the theoretical prediction of optimal selective solar-absorbing three-layer processes which shows that the experimental results agree well with the theoretical prediction.

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