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Underwater corrosion engineers apply the same principals used in underground corrosion control but use specially trained and certified scuba divers for condition assessment, and corrosion control system installation and commissioning. [23] [24] The main difference being in the type of reference cells used to collect voltage readings.
United States Environmental Protection Agency (1985) Design Manual, Odor and Corrosion Control in Sanitary Sewerage Systems and Treatment Plants (Technical Report). Morton R.L., Yanko W.A., Grahom D.W., Arnold R.G. (1991) Relationship between metal concentrations and crown corrosion in Los Angeles County sewers.
Cathodic protection (CP; / k æ ˈ θ ɒ d ɪ k / ⓘ) is a technique used to control the corrosion of a metal surface by making it the cathode of an electrochemical cell. [1] A simple method of protection connects the metal to be protected to a more easily corroded " sacrificial metal " to act as the anode .
Methods of control include directly adjusting the pH, adding phosphates, silicates as an alternative corrosion inhibitor, or adding bicarbonates for buffer. [2] Orthophosphates may be added in tap water treatment systems to prevent leaching of lead and copper from water pipes and reduce the ion content in tap water to safer, legal levels. [2]
Cathodic protection (CP) is a technique to control the corrosion of a metal surface by making it the cathode of an electrochemical cell. Cathodic protection systems are most commonly used to protect steel pipelines and tanks; steel pier piles , ships, and offshore oil platforms .
Principles and prevention of corrosion. Upper Saddle River, NJ: Prentice Hall. ISBN 0-13-359993-0. OCLC 32664979. Corrosion - 2nd Edition (elsevier.com) Volume 1and 2; Editor: L L Shreir ISBN 9781483164106; A.W. Peabody, Peabody's Control of Pipeline Corrosion, 2nd Ed., 2001, NACE International. ISBN 1-57590-092-0
Corrosion monitoring is the use of a corrator (corrosion meter) or set of methods [1] and equipment to provide offline or online information about corrosion rate expressed in mpy (mill per year). [ 2 ] - for better care and to take or improve preventive measures to combat and protect against corrosion .
DCVG (direct current voltage gradient) is a survey technique used for assessing the effectiveness of corrosion protection on buried steel structures. [1] In particular, oil and natural gas pipelines are routinely monitored using this technique to help locate coating faults and highlight deficiencies in their cathodic protection (CP) strategies.