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62. Electroformed Nanocrystalline Coatings An Advanced Alternative to Hard-Chrome Electroplating

Author

INTEGRAN TECHNOLOGIES USA INC PITTSBURGH PA, McCrea, Jon, Gonzalez, Paco, Lee, Doug, Erb, Uwe, INTEGRAN TECHNOLOGIES USA INC PITTSBURGH PA, McCrea, Jon, Gonzalez, Paco, Lee, Doug, and Erb, Uwe

Abstract

Develop an environmentally benign advanced nanocrystalline Co-based coating technology that: Is compatible with conventional electroplating infrastructure, Will produce coatings that meet or exceed the overall performance of hard chrome (hardness, wear, fatigue, corrosion, and thermal stability). Has costs similar to or less than life-cycle cost of existing hard chrome electroplating processes. Will be applied to non-line-of-sight surfaces. Cobalt alloy selection: Mechanical properties, High plating efficiency, No constituents on EPA or AFMC lists of hazardous materials, Longer term view., Presented at the 23rd Replacement of Hard Chrome Plating Program Review Meeting, November 18-19, 2003, Cape Canaveral, FL. Sponsored by SERDP/ESTCP. Contains briefing charts only.

Published
2003

89. Thermally Robust Non-Wetting Ni-PTFE Electrodeposited Nanocomposite.

Author

Tam, Jason, Lau, Jonathan Chun Fung, and Erb, Uwe

Subjects
NICKEL alloys, POLYTEF, ELECTROFORMING, NANOCOMPOSITE materials, THERMAL properties of metals
Abstract

The effect of high temperature exposure on the water wetting properties of co-electrodeposited superhydrophobic nickel-polytetrafluoroethylene (Ni-PTFE) nanocomposite coating on copper substrates was studied. This was accomplished by comparing the performance with a commercial superhydrophobic spray treatment (CSHST). The Ni-PTFE and CSHST coatings were both subjected to heating at temperatures up to 400 °C. Results showed that the Ni-PTFE was able to maintain its superhydrophobicity throughout the entire temperature range, whereas the CSHST became more wettable at 300 °C. Furthermore, additional abrasive wear tests were conducted on both materials that were subjected to heating at 400 °C. The Ni-PTFE remained highly non-wettable even after 60 m of abrasion length on 800 grit silicon carbide paper, whereas the CSHST coating was hydrophilic after 15 m. [ABSTRACT FROM AUTHOR]

Published
2019
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