Following is a Plating Troubleshooting Guide. First, click on the type of bath you are using, and then click on the problem(s) you are having. This will give you a list of possible causes.






CHLORIDE ZINC

Overall Dullness
HCD Burning
Dull LCD
Mottled or Blotchy Deposit
Barrel Perforation Spots
Roughness
Brittle Deposits
Pitting
Blistering or Poor Adhesion
Poor Throw
No Plate
Poor Efficiency
Post-Plate Staining
Post-Storage Staining
Falling Zinc Level
Rising Zinc Level
High Additive Consumption

Overall dullness of a Chloride Zinc Deposit could be an indication of:

  • Low Starter (Carrier) Concentration
  • Low Brightener
  • Poor Cleaning
  • High Temperature
  • High pH
  • Metallic or Organic Contamination
  • Inadequate Agitation

HCD Burning of a Chloride Zinc Deposit could be an indication of:

  • High Current
  • Low Starter (Carrier) Concentration
  • Low Zinc Level
  • Low Temperature
  • Low Ammonium Chloride Concentration (Ammonia containingbaths only)
  • Low Boric Acid Concentration (All Potassium baths only)
  • High or Low pH
  • Parts too close to Anodes
  • Iron Contamination
  • Current too high in Electrocleaner

Dull LCD of a Chloride Zinc Deposit could be an indication of:

  • High Temperature
  • Low Chlorides
  • High or Low Brightener
  • High or Low Starter (Carrier) Concentration
  • Low Current
  • Metallic Contamination (Pb, Cd, Cu)
  • High Zinc Metal Concentration
  • High pH
  • Poor Cleaning
  • Organic Contamination

Mottled or Blotchy Chloride Zinc Deposit could be an indication of:

  • Chromium Contamination
  • Organic Contamination
  • High Brightener
  • Low Starter (Carrier) Concentration
  • High Chloride Concentration
  • High Temperature
  • Low pH
  • Poor Cleaning

Barrel Perforation Spots in a Chloride Zinc Deposit could be an indication of:

  • Excessive Current
  • Iron Contamination
  • Low Zinc Metal Concentration
  • Low Ammonium Chloride Concentration (Ammonia containing baths only)
  • Low Boric Acid Concentration (All Potassium baths only)
  • Low Starter (Carrier) Concentration
  • High or Low pH
  • Low Temperature
  • Slow Barrel Rotation

Roughness of a Chloride Zinc Deposit could be an indication of:

  • Poor Filtration
  • High pH
  • Low Anode Area
  • Low Starter (Carrier) Concentration
  • Poor Cleaning
  • Magnetized Particles
  • Copper Contamination in the Pickle

Brittle Deposits Chloride Zinc Deposits could be an indication of:

  • High Brightener
  • Excessive thickness of the zinc deposit
  • Low Starter (Carrier) Concentration
  • High pH

Pitting of a Chloride Zinc Deposit could be an indication of:

  • High Brightener
  • High Temperature
  • Organic Contamination
  • Low Starter (Carrier) Concentration
  • Low Chlorides Concentration

Blistering or Poor Adhesion of a Chloride Zinc Deposit could be an indication of:

  • Poor Cleaning
  • High Brightener
  • Metallurgical Characteristics
  • High pH
  • Low Ammonium Chloride Concentration (Ammonia containing baths only)
  • Low Boric Acid Concentration (All Potassium baths only)
  • Metallic or Organic Contamination
  • Chromium Contamination of the Pretreatment Tanks
  • Copper Contamination of Pickle
  • Current Interruptions During the Plating Cycle
  • Low Carrier Concentration

Poor Throw of a Chloride Zinc Deposit could be an indication of:

  • Low Chloride Concentration
  • High Zinc Metal Concentration
  • High pH
  • High Brightener
  • Low Carrier Concentration
  • Low Current
  • Low Temperature
  • Excess Peroxide Added
  • Bath Contamination (Pb, Cr)

No Plate from a Chloride Zinc Solution could be an indication of:

  • Electrical Problems
  • Low Temperature
  • Over or Under Pickling
  • Metallurgical Characteristics
  • Excess Peroxide Added
  • Chromium Contamination

Poor Efficiency of a Chloride Zinc Solution could be an indication of:

  • Low Anode Area
  • Low Chloride Concentration
  • Electrical Problems
  • Low Current
  • Low Temperature
  • Low Zinc
  • Low Carrier Concentration
  • Low Brightener
  • Low pH

Post-Plate Staining of a Chloride Zinc Solution could be an indication of:

  • Insufficient Rinsing
  • Excessive Dwell Time From Plater to Chromate
  • High Brightener
  • High Organic Levels
  • Bright Dip Contaminated or Weak
  • Rinses Contaminated
  • Metallic Contamination

Post-Storage Staining of a Chloride Zinc Deposit could be an indication of:

  • Insufficient Rinsing
  • Improper Passivation
  • Corrosive Environment
  • Metallic Contamination
  • Poor Drying and Handling

Falling Zinc Level in a Chloride Zinc Solution could be an indication of:

  • Anode Area Out of Balance
  • High pH
  • Poor Anode Contacts
  • High Drag-In, Drag-Out

Rising Zinc Level in a Chloride Zinc Solution could be an indication of:

  • Low pH

High Additive Consumption with Chloride Zinc could be an indication of:

  • High Temperature
  • Organic Contamination
  • Drag-in of Low pH Rinse Water

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