Compression springs were prepared from Cr-Si high strength spring steel and coated with pure Zn and ZnNi by electroplating process. The effect of baking after electroplating as well as applying an electroless nickel interlayer on the fatigue and fatigue corrosion of the springs was investigated. The results were analyzed using weibull statistical model. A considerable improvement (8%) in fati...

This paper reports the design, fabrication, packaging, and testing of a relay-type threshold accelerometer array. The array includes 15 different sense elements ranging from 10 to 150 g in 10 g increments, and triply redundant 20 and 100 g sense elements for a total of 19 elements. The devices were fabricated using a modified sacrificial LIGA technique that creates a 100–300 m thick nickel stru...

Two coatings have been developed for petrochemical compressor antifouling and corrosion resistance purposes. One is a multilayer composite coating with a modified polytetrafluoroethylene (PTFE) impregnated organic topcoat, which gives it superior antifouling performance to the similar coating that has been used by the compressor original equipment manufacturers (OEMs). The other is a high-phosp...

The occupational and environmental hazards of nickel exposure are of great concern in environmental medicine. Nickel workers have increased risk of cancer of the nose, lung, larynx, and possibly the kidney. In the present investigation we have studied the effects of nickel ions on fetal human kidney cortex explants. The explants were continuously exposed to 5 micrograms/ml NiSO4. After 70-100 d...