Storage Tank Cathodic Protection Anodes
Materials and inquiry guidance for external cathodic protection of above-ground storage-tank bottoms. Associated piping, grounding/AC-mitigation and containment systems require separate design review.
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Define the Tank-Bottom Supply Scope Before Quoting
This guide concerns the external underside of above-ground tank bottoms. Internal wetted surfaces are a separate application: identify the stored liquid and the project specification when sending that enquiry.
New build or replacement bottom?
Send the tank diameter, foundation section, access conditions and installation sequence. Identify whether the anodes are to be installed beneath a new bottom, between bottoms or in another project-defined location.
ICCP or sacrificial design?
For a specified MMO ribbon grid, distinguish the coated active anode from any separate titanium conductor bar. For zinc ribbon or magnesium assemblies, provide the approved layout and material schedule. Do not substitute systems on price alone.
Include monitoring interfaces
List reference electrodes, test stations, cable lengths and junction boxes against the tank drawing. State which items are already supplied by another contractor to avoid omissions or duplicate supply.
For technical review: include the soil or sand resistivity, foundation layers, current demand if available, design life and owner specification. Final system selection and quantities must follow the tank CP design basis.
Prepare a line-by-line tank CP material package ยท Review quality and traceability information
Protecting Tank Bottoms and Foundation Areas
Aboveground storage tank bottoms are exposed to soil-side corrosion risks that may not be visible during operation. This page helps owners, EPCs and CP specialists compare project-defined impressed-current and sacrificial material options for new construction and suitable double-bottom retrofits.
MMO Titanium Ribbon Anode Grids
MMO-coated titanium ribbon is the active current-discharge anode in a distributed impressed-current grid beneath a new or accessible replacement tank bottom. Any uncoated titanium conductor bar is a separate, project-defined grid component.
View MMO titanium ribbon anodeZinc Ribbon Grid Layouts
Zinc ribbon anodes can be considered in tank-bottom loop or grid layouts where the current demand, electrolyte and applicable design basis support galvanic protection.
View zinc ribbon anodesMagnesium Anode Beds
Magnesium anodes may be used where project current demand, electrolyte conditions, and soil resistivity require a higher driving voltage.
View magnesium anodesRelated Products for Storage Tank Projects
Typical Storage Tank Applications
Tank-bottom CP may be considered for oil, chemical, water and fuel storage tanks at terminals and industrial plants. Associated piping, grounding/AC-mitigation and containment-zone corrosion control are separate scopes and require their own drawings and design review.
Information Needed for Quotation
Provide tank diameter, foundation type, soil or sand resistivity, required design life, anode layout concept, project standard, installation method, destination, and required delivery schedule.
Buyer Questions
Why do storage tank bottoms need cathodic protection?
Tank bottoms can corrode from soil-side moisture, salts, foundation materials, coating damage, and differential aeration. Cathodic protection helps reduce corrosion risk by supplying protective current to exposed steel.
Can zinc ribbon be used under tank bottoms?
Zinc ribbon can be used in grid or loop layouts where project design, soil conditions, and applicable standards support sacrificial anode protection. Final selection should follow the tank CP design basis.
When is an MMO ribbon grid considered for a tank bottom?
A project-designed grid using MMO-coated titanium ribbon as the active anode is commonly considered during new tank-bottom or suitable double-bottom construction where access, foundation layers, current demand and the owner specification support an impressed-current system. Any titanium conductor bar is a separate grid component.
Planning a tank bottom CP project?
Send your material take-off list or tank CP drawings for a fast quotation.