Benefits of Plastisol-Coated Hangers

A summary of the technical and economic benefits of plastisol coating on metal hangers used in acid tanks and electroplating baths.

The problem: wear on bare metal hangers

Bare metal hangers that go into acid tanks and plating baths wear out in two ways. They are attacked chemically by acid and electrolyte; and because current flows through the whole hanger, unwanted plating keeps building up on it, and stripping that build-up damages the hanger further. Over time the hangers rust, thin out and deform.

The solution: plastisol coating

Plastisol is a flexible, thick PVC coating that separates the hanger's metal body from chemicals and electric current. Only the contact tips that touch the part are left uncoated.

Comparison of an uncoated metal hanger and a plastisol-coated hanger in a plating bath — Left: uncoated metal hanger, with rust, pitting and bending. Right: plastisol-coated hanger, with only the contact tips exposed. (Image labels are in Turkish.)

Key Benefits

What plastisol-coated hangers deliver

Corrosion Protection

Plastisol resists acid, alkaline and electrolyte solutions. No liquid reaches the metal core, so rust and pitting do not form.
No Deformation

A hanger whose cross-section does not thin keeps its load capacity. Arms do not bend, and parts stay correctly positioned in the bath.
Electrical Insulation

Current passes to the part only through the contact tips. No plating builds up on the hanger body, so frequent stripping is not needed.
Cost Savings

Less plating metal, anode material and chemicals are wasted.
Cleaner Baths

Iron and copper ions no longer dissolve from the hanger into the bath, which also extends the bath's own life.
Product Quality

Current distribution is more even, reducing burning and thickness variation. The soft surface protects parts from scratches.
Less Drag-Out

The smooth surface carries less chemical from one bath to the next.
Maintenance and Downtime

Hangers are easy to clean, replaced less often, and the line stops less.

Service Life

Longer life, lower total cost

3–5×longer service life

Plastisol-coated hangers can typically be used 3–5 times longer than uncoated ones. This is a typical figure often quoted in the industry; the actual difference depends on the bath type, temperature, coating thickness and how the hangers are handled.

At Quarco, coating thickness is set between 1 mm - 7 mm depending on the application. When the coating is damaged, the hanger can be recoated, extending its total service life even further.

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Benefits of Plastisol-Coated Hangers

The problem: wear on bare metal hangers

The solution: plastisol coating

What plastisol-coated hangers deliver

Corrosion Protection

No Deformation

Electrical Insulation

Cost Savings

Cleaner Baths

Product Quality

Less Drag-Out

Maintenance and Downtime

Longer life, lower total cost

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