Electrodialysis & Descaling – titaniumelectrodes

Process Selection

Start with the Process, Not the Electrode Size

Naming your process first lets our engineers match the electrode role, coating direction, and rinse conditions to how your equipment really operates, so your first sample is reviewed against the right assumptions instead of a borrowed specification.

GATE 01

Electrodialysis

A DC field drives ions across alternating membranes into diluate and concentrate channels. Specifying the stack-end electrodes for your actual rinse chemistry keeps the electrode compartments stable and protects nearby membranes.

Electrode role

Stack-end anode and cathode inside the electrode compartments

Key data

Feed analysis · rinse composition · current and voltage · stack-end drawing

Common mistake

Sizing the electrode from the frame alone and ignoring the rinse chemistry

GATE 02

Electrodialysis Reversal

Polarity and flow roles switch on a planned cycle. Reviewing the electrode pair, connections, gas handling, and rinse for both states means each electrode is ready for anodic and cathodic duty, not just the first one.

Electrode role

An electrode pair that alternates anodic and cathodic duty

Key data

Reversal sequence · rinse in both states · connections and polarity marks

Common mistake

Applying a one-direction coating specification to a reversing stack

GATE 03

Electrochemical softening and descaling reactor skid with piping and titanium electrodes

Electrochemical Descaling

A softening or descaling reactor promotes hardness precipitation and deposit collection. Reviewing electrode roles, local chemistry, hydraulics, and solids removal together keeps scale where you want it, off the surfaces you need clean.

Electrode role

Anode plus cathode or a dedicated deposit-collection surface

Key data

Hardness · alkalinity · pH · flow · deposit location · cleaning method

Common mistake

Treating a descaling reactor as a membrane stack with a different label

Electrodialysis, EDR, and electrochemical descaling are different processes. A shared outside dimension does not create a shared electrode specification.

Not sure which gate your equipment belongs to? Our engineers will confirm it with you.

Confirm My Process Type

Inside the Stack

How Titanium Electrodes Work at the Ends of an Electrodialysis Stack

Walk through the stack layer by layer to see which operating data shape your electrodialysis titanium anode and cathode, and why a correctly specified electrode helps keep voltage stable and the neighbouring membranes protected.

DC Electric Field and Stack-End Electrodes

The anode and cathode set up the field across the whole stack and carry the anodic and cathodic reactions inside the electrode compartments.

An electrode matched to your current density spreads the load evenly, so you avoid hot spots and early coating wear.

Ion-Exchange Membranes

Alternating cation- and anion-exchange membranes guide ion transport and form the diluate and concentrate channels.

Electrode flatness and spacing are held to your frame drawing, so membranes and spacers seat without stress points.

Diluate and Concentrate Streams

Feed composition, flow, conductivity, recovery, pressure, and temperature all affect how the complete stack, including its end electrodes, should be designed.

Reviewing the full stream data up front means your product-water target is supported from the first sample.

Electrode-Rinse Circuit

Rinse composition, chloride, sulfate, pH, conductivity, flow, temperature, gas products, and recirculation shape the electrode requirement.

Coating direction is chosen for your rinse chemistry, giving you a predictable electrode life instead of guesswork.

Polarity Reversal in EDR

For reversal operation, the electrode pair, coating direction, connections, identification, rinse, and gas handling are evaluated for both polarity states.

Both electrodes are built for dual duty, so reversal cycles do not shorten the life of one side.

Electrodialysis Stack Cross-SectionScene 01 of 05

Titanium electrode stack assembly with copper busbars for electrolytic water treatment — Stack-end electrode assembly with busbar connections

Running a descaling reactor instead? There the titanium electrode supports hardness precipitation or deposit collection rather than membrane-stack ion transport. We review it as a separate process, so you never inherit a stack specification that was never meant for your reactor.

Send us your stack-end drawing and rinse data, and we will map each layer to an electrode requirement.

Review My Stack-End Electrodes

Engineering Comparison

Compare ED, EDR, and Electrochemical Descaling Before You Specify

One table, six engineering questions. Seeing the differences side by side helps your team send the right data the first time, which shortens review rounds and keeps sample costs focused on the process you actually run.

Engineering Question	Electrodialysis	Electrodialysis Reversal	Electrochemical Descaling
Primary ObjectiveWhat the equipment must achieve	Transfer ions through a membrane stack	Transfer ions with planned polarity and flow reversal	Support hardness precipitation or scale-control functions
Electrode RoleWhere the titanium electrode works	Stack-end anode and cathode	Electrode pair operating under the defined reversal sequence	Anode plus cathode or deposit-collection surface
Key Liquid DataWhat to send with your inquiry	Feed, diluate, concentrate, and electrode rinse	Feed streams, electrode rinse, and reversal conditions	Hardness, alkalinity, pH, flow, and deposit conditions
PolarityHow current direction behaves	Fixed according to stack design	Periodically reversed by control logic	Fixed or process-specific
Main Maintenance FocusWhat your service team handles	Electrode compartments, rinse circuit, membranes, and connections	Reversal sequence, flushing, rinse, and electrode compatibility	Deposit removal, cleaning, collection, and reactor access
Validation FocusHow success is confirmed	Water result, voltage, current, rinse, and stack fit	Results in both polarity states and transition behavior	Hardness result, deposit location, voltage, cleaning, and solids handling

Assumptions that should not be shared between processes: do not carry coating, polarity, rinse, or maintenance assumptions from one process into another without review. Copy the summary with one click and paste it into your project notes so every stakeholder starts from the same baseline.

Know which column describes your equipment? Send the matching data and we will start the review.

Start My Process-Specific Review

Water Chemistry Map

Map the Water Chemistry Before Defining the Electrode

Seven water parameters decide how your titanium electrode behaves in a stack or reactor. Mapping them before the drawing review lets us flag scaling, corrosion, and gas risks early, so your sample is built for your water rather than a textbook average.

Required Water Inputs

No default scores. Each axis is a value we confirm with you.

ED / EDR VIEW Industrial water treatment plant where feed water chemistry is analysed before electrode selection

Hardness

Calcium and magnesium data help define scaling risk, softening objectives, deposit behavior, and pre-treatment needs.

Possible link in your stack

Scaling risk in concentrate channels and on cathode-side surfaces, plus the level of pre-treatment your stack needs.

The map records the inputs we need. It does not calculate suitability or performance on its own; that comes from a project-specific engineering review of your actual water analysis.

Have a recent water analysis? Upload it and our engineers will mark the parameters that matter for your electrode.

Submit My Water Analysis

EDR Reversal Sequence

Review the Electrode Requirement Across the Complete Reversal Sequence

An EDR electrode does not work in one state; it works across four. Reviewing every frame of the cycle lets us specify coatings, connections, and markings that hold up in both polarities, so your reversal schedule never becomes the reason for an early electrode change.

FRAME 01

Positive

Positive-Polarity Operation

Record electrode positions, rinse chemistry, current, voltage, flow paths, product and concentrate conditions, and gas observations.

Gives you a clean baseline to compare against after every reversal.

FRAME 02

Transition

Transition and Flush

Define how current, valves, flow paths, off-spec water, rinse circulation, and safety controls behave while the polarity changes.

Helps you limit off-spec water and protect electrodes during the switch.

FRAME 03

Reversed

Reversed-Polarity Operation

Confirm that both electrode positions, connections, coatings, rinse conditions, gas handling, identification, and monitoring suit the reversed state.

Ensures neither electrode is under-specified for its second duty.

FRAME 04

Verify

Post-Reversal Verification

Compare voltage, current, water result, rinse condition, deposits, leaks, connections, temperature, and transition stability.

Turns each cycle into evidence your team can use for approval.

Reversal frequency and cleaning effect depend on your complete EDR design and operating data. We will not quote them as universal values; we verify them with you during testing.

Share your reversal sequence and we will check both electrode positions against it.

Review My EDR Electrode Pair

Deposit Hotspot Map

Locate the Deposit Before Changing the Electrode

Scale on a stack or reactor rarely starts where it is first noticed. Tap each hotspot to see which water, operating, and cleaning data explain that location, so you fix the cause instead of paying for a replacement electrode that meets the same problem.

Electrode plate stack inside an electrochemical cell where deposits and scaling can form

A deposit photo shows location, not root cause. Send water, operating, electrical, and cleaning data with it.

Hotspot 01

Stack-End Electrode Surface

Deposits on the electrode face raise voltage and can shorten coating life. Linking them to rinse and current data shows whether the electrode or the operating window needs to change.

Data to check

Rinse compositionPolarityCurrent densityTemperatureGas releaseCleaningSurface condition

You avoid replacing a good electrode when the rinse circuit is the real cause.

Hotspot 02

Electrode Compartment

Low flow or trapped gas in the compartment concentrates ions and shifts local pH, which encourages scale close to the electrode.

Data to check

FlowStagnationConcentrationpHGas outletSpacer conditionMaintenance access

Electrode geometry and spacing can be adjusted to support better compartment flow.

Hotspot 03

Membrane or Spacer Surface

Fouling here usually points to feed chemistry, cross-flow, or pre-treatment rather than the electrode, and knowing that saves an unnecessary electrode change.

Data to check

Feed analysisConcentration changesCross-flowPressurePre-treatmentCleaning history

Your budget goes to the root cause, not to parts that were never the problem.

Hotspot 04

Cathode or Deposit-Collection Surface

In a descaling reactor this is where deposits should form. The question is whether they form evenly and release cleanly during removal.

Data to check

HardnessAlkalinityLocal pHCurrent densityFlowDeposit adhesionRemoval method

A collection surface sized to your hardness load keeps cleaning intervals predictable.

Hotspot 05

Piping, Flow, and Dead Zones

Unbalanced hydraulics create low-flow zones where scale builds unnoticed and later breaks loose into the stack or reactor.

Data to check

Hydraulic balanceLow-flow zonesTemperatureConcentrationFlushingValvesDisassembly access

Electrode frames and connections can be designed for easier flushing and access.

Seeing deposits in your system? Send photos plus your operating data for a location-based review.

Request a Deposit Review

Data Blueprint

Prepare the Correct Data for the Selected Process Path

Your process decides which branch of data we need; both branches then meet at the same electrode and project fields. Preparing the right branch before you send an inquiry typically saves a full round of follow-up questions and moves your quotation forward faster.

Dimensioned electrode drawing with calipers ready for engineering data review

Start Point

Your Selected Process

Pick the branch that matches your equipment, then complete the shared fields below.

ED or EDR Path

Lets us define the stack-end electrode for your streams, rinse, and polarity.

Feed analysis
Diluate target
Concentrate condition
Conductivity or TDS
Flow and recovery
Membrane stack
Electrode rinse
Gas handling
Fixed or reversing polarity
Stack-end drawing

Descaling Path

Lets us size the reactor electrodes and collection surface for your hardness load.

Hardness
Alkalinity
pH and temperature
Flow
Target hardness result
Deposit location
Cathode or collection surface
Cleaning method
Solids removal
Reactor drawing

Common Electrode Data

Turns the process review into a buildable titanium electrode drawing.

Electrode role
Coating information if known
Active area
Dimensions and count
Spacing
Frames and sealing
Tabs and welding
Busbar interface
Total current
Voltage range

Common Project Data

Lets us plan samples, validation, and delivery around your schedule.

Drawing revision
Existing sample or photos
Test method
Acceptance criteria
Sample quantity
Repeat demand
Delivery country
Target date
Labeling needs
NDA requirement

Have most of your branch ready? Send what you have and we will tell you exactly what is missing.

Continue with My Selected Data Path

Applications

Application Context Changes the Data Required for Electrode Review

The same titanium electrode platform serves very different duties. Finding your application on the lanes below shows which inputs matter most, so your inquiry arrives complete and our engineers can respond with a relevant recommendation sooner.

ED and EDR Lane

ED 01

Brackish-Water Desalination

Stable stack-end electrodes help you hold product-water quality as feed salinity shifts.

Inputs we need

Feed ions, conductivity, product target, concentrate, recovery, electrode rinse

ED 02

Industrial Water Reuse

Electrodes reviewed for variable feed help your reuse line run through seasonal and process swings.

Inputs we need

Feed variability, pre-treatment, solids, organics, product target, cleaning

ED 03

Process-Water Demineralization

Repeatable electrodes across batches keep multi-stage stacks consistent for long-term supply.

Inputs we need

Target ion reduction, product quality, flow, temperature, stages, rinse

ED 04

Industrial wastewater and concentrate treatment facility with electrode cells

Wastewater or Concentrate Treatment

Coatings chosen for aggressive streams help protect the stack from impurity-driven wear.

Inputs we need

Impurities, target ions, concentration, membrane compatibility, rinse, gas

Descaling Lane

DS 01

Cooling-water circuit and piping in a large industrial plant

Cooling-Water Hardness Control

Collecting hardness in the reactor helps keep it off exchanger tubes and tower fill.

Inputs we need

Makeup water, cycles, hardness, alkalinity, flow, deposit collection

DS 02

Electrochemical Softening

A collection surface sized to your load supports steady softening with planned cleaning.

Inputs we need

Target hardness, collection surface, current, hydraulics, precipitate behavior

DS 03

Heat-Exchanger Pre-Treatment

Removing scale-forming ions upstream helps protect heat-transfer efficiency downstream.

Inputs we need

Water temperature, hardness, alkalinity, flow, deposit tolerance, access

DS 04

Pilot electrochemical reactor for replacement and retrofit testing

Pilot, Replacement, and Retrofit

Matching your old electrode and operating history lets you upgrade without redesigning the reactor.

Inputs we need

Existing electrode, dimensions, history, deposits, voltage, current, test plan

Application names define the questions to ask, not the final electrode specification. Your actual water and equipment data decide the design.

Found your application? Tell us about your equipment and we will prepare an application-specific review.

Discuss My Application

Troubleshooting Guide

Start with the Symptom and Build an Evidence Checklist

Pick what you are seeing and get the exact data our engineers will ask for. Arriving with a complete evidence checklist shortens the investigation, keeps your downtime short, and avoids buying parts before the cause is clear.

What are you observing in your system?

EVIDENCE CHECKLIST Quality engineer measuring a used titanium electrode during a troubleshooting review

Branch 01

Voltage Increase

Rising voltage at the same current usually means resistance has grown somewhere. These records help separate an electrode issue from a water, stack, or connection issue.

Current
Conductivity
Temperature
Flow
Electrode surface
Connections
Rinse chemistry
Stack resistance
Deposits

This tree prepares the investigation. It does not replace inspection, test records, or a project-specific engineering analysis, and we will not reach a conclusion remotely without them.

Collected your evidence? Send it over and our engineers will review the symptom with you.

Send My Evidence for Review

Factory Evidence

See the People and Controls Behind a Custom Electrode Project

Follow one electrode from drawing review to export crate. Seeing who handles each step, and what is checked along the way, lets you judge our process before you commit a sample order.

Integrated Manufacturing and TradingProduction, sourcing, and sales under one company

Approximately 100 EmployeesBased on company-provided information

Foshan, Guangdong, ChinaDirect export communication in English

SCENE 01

ARY Titanium electrode manufacturing and inspection team in Foshan China

Foshan Team and Company Facts

ARY Titanium is the customer-facing titanium electrode brand of Guangdong Lezhong Intelligent Technology Co., Ltd., combining manufacturing, sourcing, sales, and export communication in Foshan.

One team owns your project from inquiry to shipment, so nothing is lost between departments.

SCENE 02

Engineers reviewing CAD drawing and operating data for a custom titanium electrode

Drawing and Technical Review

Engineering communication covers process role, water and rinse chemistry, electrode reactions, polarity, electrical load, geometry, interfaces, validation, and any missing data.

Gaps in your data are raised before quotation, not discovered after the sample fails.

SCENE 03

TIG welding of titanium terminal riser bars on a custom electrode

Titanium Fabrication and Coating Process

Custom titanium forms, dimensions, frames, mounting, welding, connections, and coating requirements are tied to the approved drawing and project specification.

Parts are built to your revision, so they drop into your stack or reactor without rework.

SCENE 04

Quality inspection of a pilot batch of titanium electrodes with precision gauges

Inspection and Batch Identification

Material, dimensions, flatness, active area, welding, connections, drawing revision, identification, and agreed checks are reviewed for each project.

Every shipped part can be traced back to its batch and the checks it passed.

SCENE 05

Protective export packaging for titanium anodes with foam supports and part labels

Protective Packaging and Export Delivery

Coated surfaces, sealing interfaces, tabs, frames, labels, and replacement-part references are protected for international shipment.

Electrodes arrive ready to install, with labels your maintenance team can match on site.

Customers served in:

United States
India
Germany
Australia
United Kingdom
United Arab Emirates
Saudi Arabia

Want to see this process applied to your part? Request a video call or a factory review with our team.

Talk to Our Engineering Team

Technical Index and FAQ

Electrodialysis and Descaling Technical Index

Short, practical answers to the questions engineering and purchasing teams ask most. Use the index to jump to a topic and open each answer to see the data that supports it, so your team can prepare a complete brief in minutes.

The stack-end electrodialysis electrode pair creates the field that moves ions through alternating membranes into diluate and concentrate channels. Because the electrodes sit in their own rinse compartments, specifying them for that rinse, not just the feed, is what keeps voltage stable over time.

Feed and product analysis
Electrode rinse
Current and flow
Stack-end drawing

An EDR electrode alternates between anodic and cathodic duty, so we review it for both states. Sharing your reversal sequence lets us confirm coating direction, connections, and polarity markings that suit dual duty.

Reversal sequence
Rinse in both states
Connections
Flow transition
Gas handling
Validation plan

The rinse is the electrolyte your electrode actually touches. Its chloride, sulfate, pH, and temperature decide whether chlorine or oxygen evolution dominates, which in turn guides the choice between MMO titanium anode coatings and other mixed metal oxide anodes.

Composition
Chloride and sulfate
pH and conductivity
Flow and temperature
Gas products
Replacement rate

A full ion analysis with normal and peak values lets us flag scaling, corrosion, and fouling risk before the drawing review, which shortens the time to a usable recommendation.

Conductivity or TDS
Major ions
Hardness and alkalinity
Silica
pH and temperature
Solids and organics

Record where the deposit forms, then pair that location with water chemistry, current, hydraulics, and cleaning history. This tells you whether a new electrode, an operating change, or a cleaning change will solve the problem.

Deposit location
Water chemistry
Concentration
Current and local pH
Hydraulics
Cleaning and solids removal

Total current divided by active area gives current density, which drives coating life. Spacing, electrolyte resistance, tabs, and busbars then decide how evenly that current reaches the titanium electrode surface.

Active area
Current density
Total current
Voltage range
Spacing
Tabs and busbars

General answers are a starting point. Submitting your actual water, rinse, electrical, and drawing data gives you a project-specific review instead of a generic one.

Have a question that is not listed? Send it with your project data and an engineer will answer directly.

Ask an Electrode Engineer

Custom Titanium Electrodes for Electrodialysis and Descaling Systems

Electrodialysis or EDR

Electrochemical Softening or Descaling

Start with the Process, Not the Electrode Size

Electrodialysis

Electrodialysis Reversal

Electrochemical Descaling

How Titanium Electrodes Work at the Ends of an Electrodialysis Stack

DC Electric Field and Stack-End Electrodes

Ion-Exchange Membranes

Diluate and Concentrate Streams

Electrode-Rinse Circuit

Polarity Reversal in EDR

Compare ED, EDR, and Electrochemical Descaling Before You Specify

Map the Water Chemistry Before Defining the Electrode

Hardness

Review the Electrode Requirement Across the Complete Reversal Sequence

Positive-Polarity Operation

Transition and Flush

Reversed-Polarity Operation

Post-Reversal Verification

Locate the Deposit Before Changing the Electrode

Stack-End Electrode Surface

Electrode Compartment

Membrane or Spacer Surface

Cathode or Deposit-Collection Surface

Piping, Flow, and Dead Zones

Prepare the Correct Data for the Selected Process Path

Your Selected Process

ED or EDR Path

Descaling Path

Common Electrode Data

Common Project Data

Application Context Changes the Data Required for Electrode Review

Brackish-Water Desalination

Industrial Water Reuse

Process-Water Demineralization

Wastewater or Concentrate Treatment

Cooling-Water Hardness Control

Electrochemical Softening

Heat-Exchanger Pre-Treatment

Pilot, Replacement, and Retrofit

Start with the Symptom and Build an Evidence Checklist

Voltage Increase

See the People and Controls Behind a Custom Electrode Project

Foshan Team and Company Facts

Drawing and Technical Review

Titanium Fabrication and Coating Process

Inspection and Batch Identification

Protective Packaging and Export Delivery

Electrodialysis and Descaling Technical Index

Related technical pages