Hello I’m new in this forum. My impression is that this is a great site with a lot of information. Within a moth month I have learned a lot.
I have one question about MOS2.
What are the disadvantages of using MOS2 grease?
This question seems reasonable since we live in MOS hype era.
I would like to mention few of them
- Greater wear
- Reduces water resistance
Molybdenum disulfide at a grease decreases the wear resistant properties of the grease. Molybdenum disulfide has a lamellar structure, of which the layers easy can slide along each other. Molybdenum disulfide has a black colour. These lamellea can cause extra wear of the bearingmaterial. MoS2 doesn’t function very well in a wet environment.
Molybdenum disulfide in a grease increases the corrosion caused by the grease. This is caused through the formation of corrosive chemical elements by hydrolysis and galvanic corrosion between Molybdenum disulfide and metals.
Extremely wet circumstances increase corrosion, which is proven by a lot of studies. Dopes can be added in order to counteract this corrosion. However, if there are extreme pressures at the lubricant film, these dopes will fail to maintain the corrosion resistant properties of the grease.
Molybdenum disulfide at a wet environment will act like a cathode in combination with may metals. A kind of galvanic cell with potential differences up to 0,5 V will arise.
Galvanic corrosion arises then when two attached metals are exposed to a neutral electrolyte (appr. pH 7). The metal which is mentioned at most leftside of the potential ranking, will have a accelerated corrosion and the other metal will have a decellerated corrosion.
Two attached different materials in a electrolyte are forming a galvanic coupling. This will assume a potential between the neutral potentials of both metals. The least precious metal of the coupling causes accelerated corrosion due to an increase of the potential, while the other, "preciouser" metal will less corrode due to a decrease of the potential.
Regard
Miro
I have one question about MOS2.
What are the disadvantages of using MOS2 grease?
This question seems reasonable since we live in MOS hype era.
I would like to mention few of them
- Greater wear
- Reduces water resistance
Molybdenum disulfide at a grease decreases the wear resistant properties of the grease. Molybdenum disulfide has a lamellar structure, of which the layers easy can slide along each other. Molybdenum disulfide has a black colour. These lamellea can cause extra wear of the bearingmaterial. MoS2 doesn’t function very well in a wet environment.
Molybdenum disulfide in a grease increases the corrosion caused by the grease. This is caused through the formation of corrosive chemical elements by hydrolysis and galvanic corrosion between Molybdenum disulfide and metals.
Extremely wet circumstances increase corrosion, which is proven by a lot of studies. Dopes can be added in order to counteract this corrosion. However, if there are extreme pressures at the lubricant film, these dopes will fail to maintain the corrosion resistant properties of the grease.
Molybdenum disulfide at a wet environment will act like a cathode in combination with may metals. A kind of galvanic cell with potential differences up to 0,5 V will arise.
Galvanic corrosion arises then when two attached metals are exposed to a neutral electrolyte (appr. pH 7). The metal which is mentioned at most leftside of the potential ranking, will have a accelerated corrosion and the other metal will have a decellerated corrosion.
Two attached different materials in a electrolyte are forming a galvanic coupling. This will assume a potential between the neutral potentials of both metals. The least precious metal of the coupling causes accelerated corrosion due to an increase of the potential, while the other, "preciouser" metal will less corrode due to a decrease of the potential.
Regard
Miro
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