Technical support

Bath testing & plating chemistry support

We analyse electroplating bath samples in our laboratory, recommend corrections when chemistry drifts off specification, and help you set up new baths using the product lines we manufacture and supply.

Hull cell test setup on a magnetic stirrer hot plate for electroplating bath analysis

What we help with

Practical laboratory and technical backup for plating shops running CDP chemistry — from routine bath checks to new line commissioning.

  • Bath sample analysis for metal content, impurities, and balance
  • Correction recommendations — salts, brighteners, and additions to restore specification
  • New bath makeup and startup guidance for our nickel, zinc, chromium, and brass ranges
  • On-site technical support when you introduce or change a plating process

Plating defects at a glance

Rotate through common symptoms — each card shows the likely cause and corrective action.

Adhesion failures

Peeling or flaking

The plated layer separates in sheets or can be pried off the substrate.

Cause
Incomplete degreasing, residual oil films, passive base metal, or inadequate acid activation before plating.
Fix
Strengthen electro-cleaning and acid pickling; confirm water-break-free surfaces. Use an appropriate strike where the base metal is passive.

Adhesion failures

Blistering

Raised bubbles form beneath the plated layer.

Cause
Trapped hydrogen gas, insufficient pre-plate baking on high-strength steels, or latent moisture under the coating.
Fix
Bake for hydrogen relief where specified, improve rinsing and drying, and review rack drainage so parts do not retain solution.

Adhesion failures

Metallic contamination

Immersion deposits undercut subsequent layers and fail tape or adhesion tests.

Cause
Copper or iron building up in a nickel tank forms immersion deposits that interfere with bond to the substrate.
Fix
Analyse the bath for tramp metals, dummy-plate to reduce contamination, and control drag-in from upstream rinses and tanks.

Surface imperfections

Pitting or pinholes

Small, deep craters that may extend to the substrate.

Cause
Hydrogen or gas bubbles sticking to the part, suspended particulates or oil droplets acting as non-plating islands, or low pH.
Fix
Increase agitation, maintain filtration, adjust pH to specification, and eliminate organic contamination in the bath.

Surface imperfections

Roughness or nodules

A gritty, sandy texture across the plated surface.

Cause
Suspended solids in the bath, anode fines, dust, or inadequate filtration and turnover.
Fix
Service filters, clean or replace anode bags, and remove particulate sources from the tank and surrounding area.

Surface imperfections

Stains or discoloration

Uneven colour on edges, corners, or full surfaces after plating.

Cause
Insufficient rinsing between steps, drag-in from prior tanks, or incorrect pH and brightener balance.
Fix
Improve rinse cascades and counter-flow; check bath pH and run a Hull Cell test for brightener levels.

Surface imperfections

Dull or cloudy deposits

Finish lacks lustre or appears hazy across the part.

Cause
Additive imbalance — too little brightener or too much carrier — or elevated metallic contamination.
Fix
Run a Hull Cell test, adjust brighteners to supplier guidance, or carbon-treat to remove organic breakdown products.

Coverage issues

Skip plating (bare areas)

Sections of the substrate remain completely unplated.

Cause
Low current density in recesses, poor tank agitation, loose or oxidized rack contacts, or shielded part geometry.
Fix
Improve agitation and rack design; clean contacts; add robbers or auxiliary anodes to reach low-current areas.

Coverage issues

Burning (overplating)

Over-bright, dark, rough, or “fried” spots — often at tips and edges.

Cause
Current density too high, poor racking that concentrates current at protrusions, or low metal or wetter concentration in the bath.
Fix
Lower amperage, reposition parts on the rack, shield high-current areas, and analyse metal content and wetter levels.

Structural inconsistencies

Mud cracking

Fine, web-like cracks — common in heavy hard-chrome deposits.

Cause
Deposit built too thick for the process window, or bath temperature and current density outside specification.
Fix
Reduce target thickness, plate in multiple passes if required, and restore temperature and current density to supplier limits.

Structural inconsistencies

Excessive thickness variation

Heavy build on edges with thin or bare coverage in recesses.

Cause
Uneven current distribution, incorrect anode-to-cathode spacing, or no robbers or shields to balance the field.
Fix
Reposition anodes, adjust spacing, and add robbers or shields; review rack orientation relative to anode banks.

Product lines we support

Bath testing and setup guidance covers the electroplating chemistry we carry — each process range with its own salts, brighteners, and operating parameters.

Nickel

Bright & Dull Nickel

Bath analysis and makeup for decorative bright nickel and engineering dull nickel undercoats — salt balance, brightener levels, and pH control.

View Bright Nickel · View Dull Nickel

Zinc

CN & Acid Zinc

Support for cyanide and acid zinc lines — brightener maintenance, doctor solution additions, and passivate pairing after plating.

View CN Zinc · View Acid Zinc

Chromium

Bright & Hard Chrome

Bath testing for decorative bright chrome and industrial hard chrome — chromic acid balance, catalyst levels, and anode care.

View Chromium Products

Supporting

Brass & Passivating

Setup and correction for brass plating baths, zinc passivating treatments, and degreasing pretreatment.

Brass · Passivating

Laboratory & production support

Sample analysis in our lab, backed by decades of electroplating experience on the shop floor.

Yamamoto Hull cell with electroplating bath sample for bath analysis
Bath sample analysis Chemical testing to identify drift and recommend corrections
Copper plating line with rack-loaded parts in an agitated treatment bath
Line commissioning Guidance when starting a new bath or switching to CDP chemistry
Basic chemicals for electroplating bath makeup
Bath makeup Formulation support using the salts and additives we supply

How it works

A straightforward path from sample to actionable recommendations.

  1. 1

    Send a sample or brief us

    Bring a bath sample to our laboratory or describe your line, substrate, and finish requirement.

  2. 2

    We test & diagnose

    Our team analyses metal content, impurities, and balance against the specification for your process.

  3. 3

    Corrections & bath setup

    You receive clear recommendations — what to add, how much, and how to maintain the bath going forward.

Check key operational parameters

Before adjusting chemistry, verify these six operational conditions when a bath stops performing correctly.

  1. Temperature

    Match your chemical supplier’s specification. Heating inconsistencies drastically alter deposition rates.

  2. Bath pH

    Confirm pH is within your process range using a calibrated probe. It can shift quickly and affect pitting, lustre, and deposit quality before metal levels change.

  3. Voltage and amperage

    Verify rectifier output and check for excessive AC ripple, which can cause rough, brittle, or dull deposits.

  4. Electrical contacts

    Inspect bus bars, anode hooks, and cathode contacts for corrosion. Poor connections impede current flow.

  5. Agitation

    Confirm air spargers or mechanical pumps are running — without agitation, electrolyte starves near the part surface.

  6. Anodes and sludge

    Check anode material and condition. Clean anode bags so sludge does not enter the bath.

Need bath analysis or setup support?

Contact our technical team with your process details, sample requirements, or new line plans — we will advise on chemistry and supply.

Contact us