Environmental condition soil buried

EC (2000) European Commission Green Paper, Environmental Issues of PVC, Com (2000)469 as of 26/7/2000. Brussels, Belgium 2000 8. Mersiowsky I., Stegmann R. Ejlertsson J., Long term behaviour of poly vinyl chloride products under soil buried and landfill conditions. Plastics, Rubber and Composites 28 1999, 321-326. 

Depending on the bacteria and soil conditions which can be described appropriately as an extremely heterogeneous system, these transformations may be assimilatory or dissimilatory metabolic functions. Based on the recent field surveys and laboratory studies, the bacterial-environmental interactions, with reference to the cycles of sulfur and other elements, in corrosion on buried pipes are shown as Figure 1. This Figure demonstrates that microbiologically influenced corrosion (MIC) results from the activities of a microbial community. 

Telecommunications hardware consists of switchboards, electronics, computers, data transmitters, and receivers. Delicate electronic components must be protected from human actions and weather for smooth operation over long periods of time. Most failures of this type of equipment are caused by environmental factors. If left unprotected from moisture, corrosion of delicate small parts results in malfunction. Most of the telecommunications hardware is placed in buildings and hence are not exposed to corrosive environments. Telecommunications equipment with a longer design life such as cables, connectors, and antennas may be placed outside and buried and are exposed to soils, water, air, and moist weather conditions. 

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