I think i have to give you a little insight about my job....we are into corrosion control, rusting & greasing of pipeline engineering and environmental services.. it is a very tedious work because we monitor pipelines for a very far distance and we do this on foot.and since we have two types of corrosion which are internal and external type of corrosion...in external type, we deal greatly on the body surface of pipelines on the ground..and for pipelines to be protected against corrosion externally we make use of a big equipment called transformer rectifiers which discharges some volts of current to the body of the pipeline and these hinders any electrochemical reaction that the pipelines will tend to undergo with the soil close to it...and these currents can be regulated from the rectifier. we need like approximately 850volts of current so that the pipeline can be protected and we monitor this using a fluke multimeter.. And as for internal corrosion. there we first of all do pressure testing in other to know the tensile strength of the pipes and if they are not strong we replace them..that is where we make use of chemicals in doing that and it is the first thing we do by going inside the High Sea to operate on the pipeline inside the sea first to ensure that a mud inlet line adapted is connected to a source of solids-laden drilling mud to hold the pressure and the liquid discharge...that is how my job is in summary.......