Menu
Search
Filters
Close
Menu

03269 Observations of Corrosion of Electric Resistance Welded Galvanized Steel Pipe in Domestic Potable Water

Picture for 03269 OBSERVATIONS OF CORROSION OF ELECTRIC
Available for download

Information from inspection and analysis of electric resistance welded galvanized steel pipe after service in residential water systems has resulted in a compilation of observations concerning the development and severity of corrosion leading to failure.

Product Number: 51300-03269-SG
ISBN: 03269 2003 CP
Author: Adrian J. Mac Nab
Publication Date: 2003
Industries: Water/Wastewater , Corrosion Monitoring and Control
$0.00
$20.00
$20.00

Information from inspection and analysis of electric resistance welded galvanized steel pipe after service in residential water systems has resulted in a compilation of observations concerning the development and severity of corrosion leading to failure. The observations gathered over a fourteen-year period explain the development of corrosion that does not always correlate with the many factors generally thought to be responsible. The inability of the zinc coating to meet its theoretical role of galvanic protection was clearly evident, and this allowed development of localized attack and tuberculation. Both forms of corrosion result from under-deposit corrosion, or the presence of copper ions in the water. Tubercles that covered the weld seam resulted in severe grooving corrosion and accelerated failure regardless of the weld or coating quality. It appears that the corrosion of the plumbing system in each residence is progressive, the most severe attack taking place at the inlet end of the system and diminishing to light or no corrosion at the downstream outlets. Pitting and grooving corrosion found in the downstream plumbing were attributed to the techniques and components used to plumb the system.

Key Words: electric resistance welded, galvanized, domestic water, pitting, grooving, tuberculation, under-deposit attack, copper, zinc, cut end corrosion, crevice corrosion, temperature, galvanic, hardness, water softening, anions, cations, potential reversal, oxygen

Information from inspection and analysis of electric resistance welded galvanized steel pipe after service in residential water systems has resulted in a compilation of observations concerning the development and severity of corrosion leading to failure. The observations gathered over a fourteen-year period explain the development of corrosion that does not always correlate with the many factors generally thought to be responsible. The inability of the zinc coating to meet its theoretical role of galvanic protection was clearly evident, and this allowed development of localized attack and tuberculation. Both forms of corrosion result from under-deposit corrosion, or the presence of copper ions in the water. Tubercles that covered the weld seam resulted in severe grooving corrosion and accelerated failure regardless of the weld or coating quality. It appears that the corrosion of the plumbing system in each residence is progressive, the most severe attack taking place at the inlet end of the system and diminishing to light or no corrosion at the downstream outlets. Pitting and grooving corrosion found in the downstream plumbing were attributed to the techniques and components used to plumb the system.

Key Words: electric resistance welded, galvanized, domestic water, pitting, grooving, tuberculation, under-deposit attack, copper, zinc, cut end corrosion, crevice corrosion, temperature, galvanic, hardness, water softening, anions, cations, potential reversal, oxygen

PRICE BREAKS - The more you buy, the more you save
Quantity
1+
5+
Price
$20.00
$20.00
Product tags
Also Purchased
Picture for The Case Against Galvanized Piping in Domestic Water Systems
Available for download

The Case Against Galvanized Piping in Domestic Water Systems

Product Number: 51317--9398-SG
ISBN: 9398 2017 CP
Author: Catherine Noble
Publication Date: 2017
$20.00

Galvanized steel pipe is protected by a layer deposited by hard water, but may suffer corrosion in soft water. Presented are case studies of corrosion in galvanized water piping in a stadium, hotel, and county government building. Details of corrosion mechanism and mitigation strategies are also discussed.
Picture for 02446 MICROBIOLOGICALLY INFLUENCED CORROSION...
Available for download

02446 MICROBIOLOGICALLY INFLUENCED CORROSION FAILURE ANALYSIS OF 304L STAINLESS STEEL PIPING SYSTEM LEFT STAGNANT AFTER HYDROTESTING WITH CITY WATER

Product Number: 51300-02446-SG
ISBN: 02446 2002 CP
Author: Susan W. Borenstein and Philip B. Lindsay
Publication Date: 2002
$20.00

A case history is described involving microbiologically influenced corrosion (MIC) of AISI Type 304L stainless steel piping failure after being in contact with untreated stagnant, low chloride potable water for nine months. Specialized microbiological analysis techniques, including scanning electron and optical cmicroscopy, were used in the failure analysis.
Picture for 02276 WHY CORROSION INHIBITORS DO NOT...
Available for download

02276 WHY CORROSION INHIBITORS DO NOT PERFORM WELL IN SOME MULTIPHASE CONDITIONS: A MECHANISTIC STUDY

Product Number: 51300-02276-SG
ISBN: 02276 2002 CP
Author: Hongbin Wang, Hongwei Wang, Hua Shi, Cheolho Kang, and Paul W. Jepson
Publication Date: 2002
$20.00

Results of inhibitor performance at slug flow in a 101.6 mm inner diameter horizontal pipeline. Electrochemical Impedance Spectroscopy (EIS) and scanning electrom microscope (SEM) techniques are used to reveal that the strong bubble impact, high shear stress and turbulent intensity are the reasons for a poor performance of inhibitor.
Categories
Industry
Recently viewed
Popular tags
View all

Association for Materials Protection and Performance

© AMPP All Rights Reserved.
Membership Terms of Content Use
Contact Customer Support