Menu
Search
Filters
Close
Menu

Bulk Anode Advancements in Sacrificial Cathodic Protection Jackets

Picture for Bulk Anode Advancements in Sacrificial Cathodic Protection Jackets
Available for download

Zinc Tidal CP jackets have been utilized to protect the splash zone of steel reinforced concrete piles against aggressive corrosion due to seawater exposure since the mid 1990’s. Galvanic CP jackets are installed on piles in the splash zone and provide galvanic current to the jacketed areas (Figure 1). The submerged portion of the pile that extends below the jacket is always exposed to seawater.

Product Number: 51323-19161-SG
Author: Matt Miltenberger, Sameer Telang, Jason Chodachek
Publication Date: 2023
$0.00
$20.00
$20.00

Galvanic cathodic protection (CP) jackets for reinforced concrete piling utilize a GFRP or PVC stay-in-place form in the tidal zone and a bulk anode in the constantly submerged zone. The stay-in-place form normally covers spall repairs and contains an anode embedded in the cement mortar. Below the stay-in-place form (Jacket), a bulk anode provides corrosion protection for the length of pile exposed below mean low water. Commonly, these bulk anodes are 48 lb. zinc hull anodes. Since the galvanic corrosion process releases zinc ions into the seawater, many marine biologists, owners and engineers question the environmental impact of introducing zinc ions into the marine environment. This paper evaluates the effectiveness and compatibility of using bulk aluminum anodes as an alternative to the traditional bulk zinc anode. Data on the performance and compatibility of aluminum bulk anodes with two types of tidal cathodic protection jackets will be presented. The aluminum bulk anodes are evaluated for compatibility with galvanic jackets using traditional expanded zinc mesh, and alkali-activated zinc anodes inside the jackets. The result of this trial demonstrates that environmentally friendly aluminum anodes can be used as an alternative to the bulk zinc anodes for marine tidal jacket protection.

Galvanic cathodic protection (CP) jackets for reinforced concrete piling utilize a GFRP or PVC stay-in-place form in the tidal zone and a bulk anode in the constantly submerged zone. The stay-in-place form normally covers spall repairs and contains an anode embedded in the cement mortar. Below the stay-in-place form (Jacket), a bulk anode provides corrosion protection for the length of pile exposed below mean low water. Commonly, these bulk anodes are 48 lb. zinc hull anodes. Since the galvanic corrosion process releases zinc ions into the seawater, many marine biologists, owners and engineers question the environmental impact of introducing zinc ions into the marine environment. This paper evaluates the effectiveness and compatibility of using bulk aluminum anodes as an alternative to the traditional bulk zinc anode. Data on the performance and compatibility of aluminum bulk anodes with two types of tidal cathodic protection jackets will be presented. The aluminum bulk anodes are evaluated for compatibility with galvanic jackets using traditional expanded zinc mesh, and alkali-activated zinc anodes inside the jackets. The result of this trial demonstrates that environmentally friendly aluminum anodes can be used as an alternative to the bulk zinc anodes for marine tidal jacket protection.

Product tags
Also Purchased
Picture for Investigation of Polymeric Elastomers for Cavitation and Erosion Resistance
Available for download

Investigation of Polymeric Elastomers for Cavitation and Erosion Resistance

Product Number: 51323-18950-SG
Author: Allen Skaja, Christine Henderson
Publication Date: 2023
$20.00

Cavitation occurs in localized areas where there is a pressure drop across a structure; the water goes through a phase transition and forms water vapor. These vapor bubbles implode, resulting in high velocity micro-jets which impact adjacent surfaces. These impacts release shockwaves of energy, which cause microscopic particles of the surface material to flake off.1 Repeated micro-jet impact causes microfractures in the affected surfaces and leads to pitting.
Picture for Investigation of the Effects of Residual Peroxide on Localized Corrosion Susceptibility of Stainless Steel Equipment at Hanford Waste Treatment Facility
Available for download

Investigation of the Effects of Residual Peroxide on Localized Corrosion Susceptibility of Stainless Steel Equipment at Hanford Waste Treatment Facility

Product Number: 51323-19095-SG
Author: K.J. Evans, S. Chawla, J.A. Beavers, N. Sridhar, S.T. Campbell
Publication Date: 2023
$20.00

The Effluent Treatment Facility (ETF) at the Hanford Nuclear Reservation site is a multi-waste treatment facility that removes radioactive and hazardous contaminants from various sources such as condensate wastewater generated by 242-A Evaporator campaigns, groundwater projects, solid waste disposal facilities, and other Hanford clean-up activities. It has been operational since December 1995 and will reach its original 30-year design life in 2025. The waste streams processed in the ETF are different from Hanford tank-farm wastes, in that the ETF wastes range to relatively higher chloride and sulfate concentrations, and lower nitrate and nitrite concentrations.
Picture for Practical Considerations For The Assessment Of HTHA Risk
Available for download

Practical Considerations For The Assessment Of HTHA Risk

Product Number: 51323-19187-SG
Author: Jeremy Staats, Dave Dewees, Gerrit Buchheim, Frank Sapienza
Publication Date: 2023
$20.00

Becht is among multiple engineering groups which has developed a practical model to continue giving owner-operators higher confidence by extending HTHA assessment methodologies to be more quantitative using decades of development from the literature. This model has incorporated a well-established analytical damage model that can produce time-based Nelson Curves for carbon steel and C-0.5Mo materials, based on the temperature, hydrogen partial pressure and applied stresses.

The key to any quantitative model is managing the input parameters and validation of input data.
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