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Author : Robert Gummow

Robert Gummow

Bob (Robert) Gummow is a Senior Technical Engineer at Corrosion Service Company Ltd. He has been with Corrosion Service since 1962 serving in various capacities, including formerly Vice President Engineering, President and CEO. Bob is a renowned expert in all areas of electrochemical corrosion prevention, having been awarded the NACE Technical Achievement Award (1989, 1992), NACE Brannon Award (2004), Col. Charles C. Cox Award (2013) and most recently NACE Fellow Honor 2016. Bob has a Bachelor’s degree in electrical engineering from the University of Toronto, Canada, he is a NACE certified Corrosion Specialist and a Professional Engineer.

Published : March 6, 2016

The conventional understanding of the cathodic protection mechanism is illustrated in the definition of cathodic protection arising from the research of Mears and Brown in 1938. That is, cathodic protection is complete when the corrosion cell cathodes are polarized electronegatively to the open circuit potential […]

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Published : March 11, 2012

Some recent papers contain inaccurate information regarding the validity of the -850 mVcsE current applied criterion, the so-called on-potential criterion. To qualify as a corrosion control criterion the -850 mVcsE value must imply a sound engineering judgment of the corrosion rate. Only the -850 mVcsE […]

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Published : March 11, 2007

The 100mV cathodic polarization criterion is being used more extensively on piping in the oil and gas industry which has prompted a discussion on the limits of its use. This paper summarizes the technical literature on the validity of this criterion with respect to elevated […]

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Published : May 17, 2005

Prestressed concrete cylinder pipe (PCCP) used for water and sewer transmission service is composed of a thin wall steel cylinder, lined on the interior and exterior with cement mortar, and reinforced by prestressing wire either wrapped around the steel cylinder or embedded in the exterior […]

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Published : August 3, 2004

External corrosion of iron watermains has been a problem for municipalities for over 100 years. The three main causes of corrosion, in a historical context are: stray currents from electrified transit systems dissimilar soils galvanic corrosion All of these causes remain with us today, although […]

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Published : May 4, 2004

The service life of Mg anode cathodic protection systems installed on iron water mains has, in some instances, been significantly less than design calculations would predict. Testing of high-potential Mg alloys from various suppliers using the ASTM G97-89 test method indicates that efficiencies are widely […]

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Published : March 28, 2004

Although cathodically protected pipelines are often connected directly to electrical ground in stations and plants, there is little information on the amount of current required to polarize various grounding materials such as copper, tinned copper, stainless steel, silicon iron, and galvanized steel. This paper presents […]

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