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Loss in Pipeline Carrying Capacity Due to Corrosion and Tuberculation
Author(s) -
Larson Thurston E.
Publication year - 1960
Publication title -
journal ‐ american water works association
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.466
H-Index - 74
eISSN - 1551-8833
pISSN - 0003-150X
DOI - 10.1002/j.1551-8833.1960.tb00607.x
Subject(s) - corrosion , supersaturation , calcium carbonate , saturation (graph theory) , carbonate , materials science , chemistry , calcium , metal , yield (engineering) , chemical engineering , metallurgy , composite material , mathematics , organic chemistry , engineering , combinatorics
This article discusses the classification of calcium carbonate stability as an adjunct to natural or artificial protective coatings on metals. This is due to the fact that the quantity of an available protective ingredient is limited for any water and may not be sufficient to neutralize or react with the quantity of products resulting from corrosion ‐ that is, the rate of reaction of inhibiting agents may not equal or exceed the rate of production of corrosion products from an unprotected metal. It is also clear that higher velocities of flow, even if induced by the aid of applied energy, improve the efficiency of calcium carbonate stability by bringing the protective ingredients more rapidly and in greater volume (or mass) to the point of corrosion reaction. The saturation index can indicate the quantity of available supersaturation of calcium carbonate. But there is also a need for a numerical parameter that can indicate, more effectively than the saturation index, the latent buffer capacity of water to yield more available calcium carbonate by reaction with the OH‐ corrosion product. Other aids or inhibitors may also be beneficial under certain conditions. These aids should be studied and reported only for specific test conditions or applications.