On the corrosion resistance of metalic materials by agricultural chemicals (IV)

Abstract

Lime sulphur compound, DDT-emulsifiable liquid, BHC-emulsifiable liquid, DDT-wettable powder, calcium arsenate and lead arsenate were used as an agricultural chemicals and the corrosion test was done in moving liquid which stirred up with constant velocity. Low carbon steel, alminium, duralumin. copper and brass were used as a metalic materials for the test sample. Other conditions for measuring is the same as described in previous papers.
At low carbon steel, the loss in weight is linearly increase with times in lime sulphur compound, but is little in BHC-emulsifiable liquid. At alminium the loss after five hours is rapidly increase and the amount is large in calcium arsenate solution. At duralumin the loss to five hours is linearly increase with time, after that its tendency become loss in lime sulphur compound. At copper, the loss in lime sulphur compound is linearly increase with time and its amount is very large. The effect of respective chemicals upon the brass is little and the relation between the loss and the time is not clearly found.