In-situ 2D maps of pH shifts across brass-lead galvanic joints using microelectrodes

Measurement Science & Technology
Xiangmeng MaDarren A Lytle

Abstract

Galvanic corrosion in drinking water distribution systems, such as conditions following partial lead (Pb) service line replacement, has received recent attention. In order to better understand conditions at galvanic connections that lead to enhanced metal release and provide remedial strategies, the water-metal and anodic-cathodic interfaces at these locations must be better understood. In this paper, a pH microelectrode system was used to create in-situ 2D spatial images of the pH of water across two brass coupons connected by a leaded solder joint at 100 μm above the metal's surface under flowing and stagnation conditions. Water stagnation resulted in significant pH changes across the surfaces compared to flow condition. Under stagnation, the pH above the anode (leaded solder) was 1.5 pH units below the bulk water and as much as 2.5 units below the cathode (brass). These conditions can enhance lead release at the anode, which reflects different anodic-cathodic relationships of coupled metals primarily controlled by water flow. Most importantly, this work has demonstrated the ability to make real pH measurement at the surface of corroding metals using a novel microelectrode approach.

References

Dec 1, 1994·Applied and Environmental Microbiology·D De BeerP S Stewart
Feb 1, 1993·Applied and Environmental Microbiology·D de BeerS P Ottengraf
Mar 1, 1997·Applied and Environmental Microbiology·D De BeerM Kuhl
Feb 4, 2010·Environmental Health Perspectives·Rebecca Renner
Aug 25, 2010·Osteoporosis International : a Journal Established As Result of Cooperation Between the European Foundation for Osteoporosis and the National Osteoporosis Foundation of the USA·T-I ChiangY-W Cheng
Aug 27, 2010·Environmental Science & Technology·Caroline K NguyenMarc A Edwards
Oct 25, 2011·Water Research·Yanjiao Xie, Daniel E Giammar
Jun 9, 2012·Water Research·Clément CartierMarc Edwards
Jul 28, 2012·Water Research·Yin WangDaniel E Giammar
Aug 21, 2012·Environmental Science & Technology·Roger B Arnold, Marc Edwards

❮ Previous
Next ❯

Citations

Jul 12, 2020·Micromachines·Kelsey L RodriguezWoo Hyoung Lee
Aug 2, 2018·Environmental Science and Pollution Research International·Iat-Leong LeiYi-Pin Lin
Sep 10, 2019·Langmuir : the ACS Journal of Surfaces and Colloids·Xiangmeng MaWoo Hyoung Lee
Jan 30, 2018·Environmental Science & Technology·Xiangmeng MaWoo Hyoung Lee
Feb 16, 2018·Environmental Science & Technology·Michael K DeSantisDarren A Lytle

❮ Previous
Next ❯

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.

© 2022 Meta ULC. All rights reserved