Page 131 - Challenges in Corrosion Costs Causes Consequences and Control(2015)

DATA COLLECTION AND ECONOMIC ANALYSIS 109

general or local metal wastage by dissolution, stress corrosion cracking, corrosion
fatigue, erosion corrosion, oxidation, and sulfidation. Phenomenon such as creep,
mechanical damage, and stress rupture were excluded.
Elements of the cost of corrosion were identified to provide a convenient checklist
for the consistent treatment of costs in all segments of the economy.

Capital Costs
Replacement of equipment and buildings
Excess capacity
Redundant Equipment

Control Costs
Maintenance and repair
Corrosion control

Design Costs
Materials of construction
Corrosion allowance
Special processing

Associated Costs
Loss of product
Technical support
Insurance
Parts and equipment inventory

Costs incurred for coatings of buried steel pipelines are corrosion costs while
painting of automobiles are ascribed partly to corrosion and partly to aesthetics.
In this case, one half of the cost of painting of automobiles is ascribed to corrosion.
Similar judgments were made in other areas where multipurpose operations were
encountered.
Several items have been excluded in the B.C.L. model from the cost of corrosion.
The loss of life and goodwill were not considered. Catastrophic and one-time costs
were not included. Costs because of oil spill, advertising, and marketing costs related
to corrosion resistance were not included.
Total corrosion costs were defined by B.C.L. as all costs above those incurred
in the absence of corrosion. Avoidable corrosion costs were defined as those costs
that are amenable to reduction by the most economically efficient use of presently
available corrosion control technology.
Determination of avoidable costs was difficult as the best practice was difficult to
measure in economic terms and there was limited database available for avoidable