Corrosive environment rainfall

Although the mechanism will be essentially electrochemical, there are many characto istic feature of soil as a corrosive environment which will be considered subsequently it,can, however, be stated here that the actual corrosiveness of asoil will d )end upon ad interaction between rainfall, cliniate and soil reaction.. ... 

Except for zones below the level of permanent ground water where the environment is water-saturated, and for zones of dry surface sand, continual variation may be expected to occur in the water content of soils. This is usually dependent on rainfall, snow, flooding and such climatic influences, though irrigation practices in many agricultural areas influence water content and hence the corrosion rates. 

Atmospheric corrosion of lead involves exposure to industrial, rural and marine environments. The mode of corrosion in the three environments is different. The rural environment consists of humidity, airflow and rainfall, which may be considered to be innocuous. The marine environment consists of chloride entrained in air and could... 

Atmospheric corrosion is an electrochemical process with the electrolyte being a thin layer of moisture on the metal surface. The composition of the electrolyte depends on the deposition rates of the air pollutants and varies with the wetting conditions. The factors influencing the corrosivity of atmospheres are gases in the atmosphere, critical humidity and dust content. Two rural environments can differ widely in average yearly rainfall and temperature and can have different corrosive... 

In statistical terms, the primary goal of an experimental design is to introduce controls that eliminate or significantly reduce statistical dependence between the factor of interest and other factors that might influence the test outcome or dependent variable. To illustrate, consider three variables X, Y, and Z. X is an experimental factor, Y is a test outcome measure or dependent variable, and Z is an independent variable that is correlated with both Y and X. For example, in atmospheric corrosion, the corrosion rate (Y) is influenced by both temperature (X) and rainfall (Z). However, a wet season will also tend to be a cool one in the natural environment, so temperature and rainfall will be correlated, or confounded. 

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