Testing saturated storage

From this data it is clear that the 85 and 131°C lifetests both ranked the manufacturers in the same order, and that the results of these tests were totally at variance with those of the saturated storage tests. The explanation for this behaviour was obtained from the delamination data and from an analysis of the type of corrosion which caused the failures on the various tests. 

The difference between the results of the saturated storage tests and the lifetests can thus be explained as follows. Failures during the saturated storage tests only occur after delamination between the plastic and the die, and are related to the impurity concentration of the plastic, whereas failures during lifetests will usually be attributed to passivation defects and in this case delamination is not a necessary precondition for failure. Thus saturated storage tests only assess the plastic, while lifetests assess both the plastic and the passivation. With some combinations of plastic and passivation, the two types of test will... 

Despite the reservations about the scope of the saturated storage test, the latter is very popular with semiconductor manufacturers because it is a quick and simple method of monitoring some of the factors which will influence the reliability of components operating in moist environments. However, there are indications that the semiconductor manufacturers are also beginning to make more use of the rapid lifetests, although there is as yet no consensus on what the test conditions and duration should be. 

Wet cure was in saturated lime water until time 0 test dry cure was storage in laboratory air (about 25° C and 50% relative humidity) until time of test. 

The aim of the Greek test site was to study the possibility for hydrogen to become an alternative product for wind-park developers, in case electricity transmission lines are saturated, studying at the same time the performance of hydrogen production and storage technologies under variable power input. 

Water penetration of the test samples occurs in several ways. Samples that are placed in mediums with humidity of 50%-60% and 85%-95% swell gradually and are not stabilized in weight within one year. The samples stored in water are saturated with it in half a year and their subsequent storage in these conditions does not lead to increase in weight. By this time, the stress-strain parameters in compression are stabilized. Note that these parameters continue to decrease for the samples in 50%-60% and 85%-95% humidity because water absorption of polymer concrete continues. 

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