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The structural attributes and degradation mechanisms are reviewed for Fomblin Z®, Demnum , and space applications such as in satellites [4]. The backbone of the molecule contains only single bonds which allow free rotation of the backbone atoms producing a fluid with excellent viscosity characteristics. The high temperature oxidative stability is partly due to their high molecular weight and the shielding effect the highly electro-negative fluorine atoms have on protecting the carbon/oxygen backbone [5]. Comparing hydrocarbon chemistry in oxidative environments, hydrocarbons have the tendency to form water and OH radicals via a free radical process. This situation does not apply to perfluorinated compounds due to the resistance of the C-F bond to the attack by free radicals and the thermodynamic instability of OF 2 and OF species [6,7]. This renders PFPAEs JOURNAL OF SYNTHETIC LUBRICATION

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A review of the effect of metals on the thermo-oxidative stability of perfluoropolyalkylether lubricants

Hellman

Gschwender

Snyder

2006

J. Synthetic Lubrication

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The effect of hard coated metals on the thermo‐oxidative stability of a branched perfluoropolyalkylether lubricant

Hellman

Zabinski

Gschwender

et al. 2007

J of Synthetic Lubrication

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Interaction of fomblin^® lubricant with surface nitrided and/or coated bearing (M50) steel

Nainaparampil

Massey

et al. 2009

Lubrication Science

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High-temperature perfl uoropolalkylether lubricants including Fomblin ® are susceptible to degradation and cause corrosion in the presence of ferrous metals such as M50 bearing steel. This paper describes the effect of surface treatment (nitriding), coating chemistry and architecture in preventing corrosion/oxidation of M50 steel and thermo-oxidative degradation of Fomblin ® fl uid. Specifi cally, Cr-CrN multilayered coating architecture was used with and without a nitrided steel surface. The oxidation/corrosion tests were conducted by immersing the nitrided and/or coated M50 coupons in Fomblin ® fl uid in an oxidative environment at 270°C for 24 h and compared with untreated/uncoated coupons. It is shown that a considerable lessening of the corrosion of the steel and degradation of the Fomblin ® fl uid can be achieved by nitriding alone. Nitriding in combination with the multilayered Cr-CrN coating exhibited the best protection. The results are discussed in relation to the literature data.

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Cited by 6 publications

References 8 publications

A review of the effect of metals on the thermo-oxidative stability of perfluoropolyalkylether lubricants

A review of the effect of metals on the thermo-oxidative stability of perfluoropolyalkylether lubricants

The effect of hard coated metals on the thermo‐oxidative stability of a branched perfluoropolyalkylether lubricant

Interaction of fomblin^® lubricant with surface nitrided and/or coated bearing (M50) steel

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Cited by 6 publications

References 8 publications

A review of the effect of metals on the thermo-oxidative stability of perfluoropolyalkylether lubricants

A review of the effect of metals on the thermo-oxidative stability of perfluoropolyalkylether lubricants

The effect of hard coated metals on the thermo‐oxidative stability of a branched perfluoropolyalkylether lubricant

Interaction of fomblin® lubricant with surface nitrided and/or coated bearing (M50) steel

Contact Info

Product

Resources

About

Interaction of fomblin^® lubricant with surface nitrided and/or coated bearing (M50) steel