Corrosion Science Chemistry Research Article | Page 14

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Corrosion: Understanding the Basics
Table 3 Elements of cost of corrosion
Element of cost
Replacement of equipment or buildings
Loss of product
Maintenance and repair
Redundant equipment
Corrosion control
Inhibitors
Organic coatings
Metallic coatings
Cathodic protection
Technical support
Design
Material of construction for structural integrity
Material of construction
Corrosion allowance
Special processing for corrosion resistance
Insurance
Parts and equipment inventory
Example
Corroded pressure vessel
Corrosion leak
Corrosion contamination of product
Corrosion during storage
Repair corroded corrugated metal roof
Weld overlay of chemical reaction tank
Repair pump handling corrosive slurry—erosion and
corrosion
Scheduled downtime for plant in continuous operation,
for example, petroleum refinery
Installation of three large fans where two are required
during operation
Injection of oil wells
Coal tar on exterior of underground pipeline
Paint on wooden furniture
Topcoat on automobile—aesthetics and corrosion
Zinc-rich paint on automobile
Galvanized steel siding
Chrome-plated faucets—aesthetics and corrosion
Cathodic protection of underground pipelines
Corrosion-resistant alloy development
Materials selection
Corrosion monitoring and control
Stainless steel for corrosive applications
Stainless steel for high-temperature mechanical properties
High alloy to prevent corrosion products contamination,
for example, drug industry
Thicker wall for corrosion
Stress relief, shot peening, special heat treatment (e.g.,
Al alloys) for corrosion
Portion of premiums on policy to protect against loss
because of corrosion (to cover charge of writing and
administering policy, not protection amount)
Pumps kept on hand for maintenance, for example,
chemical plant inventory
Source: Ref 1
induced leak in an oil pipeline, with resulting loss of product and
environmental contamination—can result in costly damage that is diffi-
cult to either assess or repair as well as massive legal penalties as
“punative damage.”
Sources of Information
Sources of information pertaining to corrosion and corrosion preven-
tion are quite varied and include the following:
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Texts, reference books, and journals
Videos and home study courses
Software products
Computerized databases