The problem of corrosion and its influence on spring performance is possibly even more vital than any other component in the field of engineering. This may seem to be an overstatement until the peculiar position of springs in engineering is fully understood. A spring is a device for storing and releasing energy, either at a definite time cycle, of which motor‐car or aero valve springs are a good example, or in continuous but out‐of‐phase timing, as typified for instance in the oscillating of the coil suspension of motor‐cars. Again, this unique engineering component may be called on to operate only at intervals, such springs including those found in electric light switches, return mechanisms and the like. Thus coil springs can be quite fairly said to be some of the most ubiquitous components in industry.
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