ME 4763 Chapter : Fall 2010
Document Summary
Me 4763 fall 2010 first test. The addition of oxygen provided by the water provides an additional reduction process by consuming more electrons, which creates fe(oh)3 (rust). Answer any one of the following questions: (15: a) how does hydrogen function in making cracks grow in cathodic protection systems involving h+ ions in solution. Hydrogen is absorbed and diffuses inward and builds up pressure in internal voids great enough to produce internal cracks: describe the crack growth mode in representative alloy systems activated by hydrogen. A metal is stressed in the elastic region where a crack widens just enough to allow for further corrosion. Stainless steel heat exchanger tube from co2 compressor intercooler in chloride containing environment: describe the crack growth features in scc. Change the environment, oxidizing potential, protective coating, or applied/residual stress levels. The ph level should be kept between 8-8. 5 by alkaline regulators and inhibitors: optimum material for handling hf acid in all concentrations is.
