How right or wrong it will be to predict the erosion-wear resistance based on the data obtained form sliding wear results? Among other variations in the sliding contact carries a normal load, while in erosive wear the angle of attack by the erosive media is different. Qualitatively can a surface sustaining itself in sliding contact (neglecting the effect of/on counter face) can also be expected to resist the erosive wear (given other conditions i.e temperature and chemical environment is kept Constant?
dear Shaikh Asad Ali Dilawary, I believe the sliding wear, in particular at low speed, represents a much more severe condition than a pure erosive wear state although their conditions are hardly comparable. In slinding wear you might deal with the interactions of 3 components (slider, Lub, substrate), compared to 2 (fluid and substrate, without any abrasives like sand?) in erosive wear. Often the relative motion accelerates the reactions and hence the material removal in sliding wear significantly (in particular in alternating motion / turning points) while in some erosion processes passivation layers are formed which reduce or even stop further erosion for some time. However to use this as you do to argue, that materials that sustain sliding contact conditions can also be expected to resist the erosive wear could be at least a starting point. The difficulty I see, is the chemical reaction in erosion which could determine the erosive wear in some processes. However if you add a chemically passive slider into an erosive wear process you will have a reference point for your analysis.
Similar ideas considered in grinding with ELID (Electrolytic In-Process Dressing) by Ohmori et al. where faster precision or super finishing is achieved by sliding abrasives (precision grinding wheel) in combination with a chemical reaction at the surface (electrolytical contineous surface conditioning of the workpiece / substrate.
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First sliding wear can results in adhesive wear and abrasive wear. The contact load is important specially in starved lubrication regime. Erosive wear will advance if the sliding contact results in more adhesive wear and the wear debris becoming somehow large enough to create a spike in point contact load. If the tribofilm is solid enough to resist contact temperature then you will diminish the effects of erosive wear. All depends on your lubricant variables and contact load and the speed you are working with. If you optimize these conditions you will lessen the effects of erosive wear.
Just to add more fuel to above discussion
Depend on triobo pair material,
Transfer film stability.
Sure when we say tribofilm formation. It is also related the type of materials used
Rüdiger Rentsch The difficulty of a particular chemical environment as may be found in erosive conditions can be met by carrying out the sliding wear test in similar media. Other than this i agree that sliding conditions impose rather harsh conditions than most erosive wear conditions would manage. However the wear mechanism can be fundamentally different in erosive and sliding conditions i.e. formation of tribo layer is much more likely in sliding contacts due to additi0onal frictional heating, however this may or may not be true for erosive wear conditions. in such cases i.e. absence of tribo layer the erosive wear could still be worse than sliding wear, thus we can imagine some circumstances where sliding wear resistance may not translate into erosive wear resistance.
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