Fretting corrosion resistance

Xulin, S., Ito, A., Tateishi, T., et al., "Fretting Corrosion Resistance and Fretting Corrosion Product Cytocompatibility of Ferritic Stainless Steel, Journal of Biomedical Materials Research, Vol. 34, 1997, pp. 9-14. 

Hendry, J. A. and Pilliar, R. M., The Fretting Corrosion Resistance of PVD Surface-Modified Orthopedic Implant Alloys, Journal of Biomedical Materials Research (Applied Biomaterials), Vol. 58, 2001, pp. 156-166. 

Satendra Kumar, Sankara Narayanan T. S. N., Ganesh Sundara Raman S. and Seshadri S. K. (2010c), Surface modification of CP-Ti to improve the fretting-corrosion resistance Thermal oxidation vs. anodizing , Mater. Sci. Eng. C, 30, 921-7. (doi 10.1016/j. msec.2010.03.024)... 

Xulin S., Ito A., Tateishi T. and Hoshino A. (1997), Fretting corrosion resistance and fretting corrosion product cytocompatibility of ferritic stainless steel , J. Biomed. Mater. Res., 34,9-14. (doi 10.1002/(SICI)1097-4636(199701)... 

Fretting corrosion (36,37) can lead to high contact resistance of base metal contacts, such as tin plate in electronic connectors. Small cycHcal displacements of the connector halves occur because of external vibration or differential thermal expansion and contraction of the mating contacts. The wear debris that is formed remains in the contact zone. The accumulation of oxide debris in the contact region leads to increased contact resistance. Solutions to this problem are stmctures that do not permit movement of contact surfaces with respect to one another, the use of gold as a contact finish, and the appHcation of thick coatings of contact lubricants and greases, which reduce the rate of wear and restrict access of air to the contact surfaces. 

When two metals in intimate contact are subjected to vibration, a dark powder forms at the areas of contact. The effect is referred to as fretting corrosion though it is due to wear rather than true corrosive attack. The galling effect between nickel and steel ensures good resistance to fretting corrosion and lubricated nickel against steel is a very satisfactory combination used widely in industry for components assembled by press-fitting. 

Warlow-Davies used a technique in which specimens were subjected to fretting corrosion and then tested in fatigue to show the effect of fretting damage in lowering resistance to fatigue. 

Being less plentiful and more expensive than nickel, cobalt is usually alloyed with chromium for applications where the alloys have practical advantages over similar nickel- or iron-base alloys. The cobalt-base alloys, for example, are better resistant to fretting corrosion, to erosion by high-velocity hquids, and to cavitation damage. 

Good general corrosion resistance Good protection from fretting corrosion Good machineability... 

High Resistance Failures Due to Fretting Corrosion of Separable Connectors Using Tin Finishes... 

Prevention. Fretting, because of the significant role of oxidation, is best combatted by oxidation-resistant coatings, for example, electroless nickel or softer self-lubricating coatings like silver or indium. Solid-film lubricants are also successfully employed. Additional information on prevention of fretting corrosion can be found in Chapter 2, Principles of Corrosion. ... 

Nickel-chromium for corrosion resistance and toughness in impact fretting... 

Fretting corrosion. The relatively good resistance of cast irons to fretting corrosion is influenced by such variables as lubrication, hardness variations between materials, the presence of gaskets, and coatings. 

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