CORRELATION BETWEEN A SCALE OF ONE TO TEN FOR CORROSION RESISTANT METALLIC PACKING MATERIALS ANDCLASSIFICATION OF CANNED FOOD RANKING IN TERMS OF ITS CORROSION ACTIVITY

摘要

A scale of one to ten based on corrosion depth K_dep index showing the depth of corrosion failure can be used to characterize corrosion resistance of metallic packing materials. Classification of canned food in terms of its corrosion aggressiveness is based on the values of gravimetric corrosion rate index K~-_gr (g/(m~2-hour)) which characterizes reduction of weight of corrodent per unit time, falling per unit area. To establish correlation between a one to ten scale for corrosion resistance of metallic packing materials and classification of canned food in terms of its corrosion aggessiveness it is necessary to establish interrelation between corrosion rate indexes of tin plate in fruit-and-vegetable juices and these indexes in organic acids test solutions. The analytical interrelation between corrosion depth and gravimetric corrosion rate indexes can be expressed as follows.