What problems does C-75 solve?

It reduces product adhesion and buildup, improves cleanability and transfer rates, and can extend cleaning intervals and reduce shutdowns on process equipment such as conveyor screws and rotary valves.

What materials work with C-75?

Stainless steels and nickel-based alloys are the primary candidates. Suitability depends on part geometry and the surface-performance goal.

How is C-75 different from standard electropolishing?

C-75 layers mechanical refinement with electrochemical polishing to reach finishes and adhesion-reduction results beyond what either process delivers alone.

Passivation is a chemical treatment that removes free iron and surface contaminants from stainless steel and strengthens its naturally occurring, corrosion-resistant chromium-oxide layer. It does not change part dimensions.

What is the difference between nitric and citric acid passivation?

Nitric acid is the traditional, aggressive method effective on heavy contamination. Citric acid is biodegradable and safer for medical, food, and pharmaceutical work while achieving comparable corrosion resistance. Harrison offers both.

When should stainless steel be passivated?

After machining, welding, grinding, or forming; before high-purity service; when customer or industry standards require it; and on a preventive-maintenance schedule in high-chloride environments.

Does passivation change part dimensions?

No. Passivation removes only free iron and contaminants, so there is no measurable change to base-material dimensions.

What standards does Harrison passivate to?

ASTM A967, ASTM A380, ASTM B912 (electropolishing passivation), AMS 2700, and customer-specific specifications, with copper sulfate and ferroxyl testing for verification.

Harrison C-75 Services

Harrison C-75: Proprietary Polishing for Product Adhesion & Buildup

What is the Harrison C-75 process? Harrison C-75 is a proprietary finishing process — developed by Harrison Electropolishing — that combines mechanical and electrochemical polishing to produce exceptionally smooth, cleanable surfaces on stainless steels and nickel-based alloys. It is used to reduce product adhesion and buildup, improve transfer rates, and extend cleaning intervals on process equipment.

Mechanical and Electrochemical Polishing

The Harrison C-75 polishing process combines mechanical and electrochemical polishing processes to produce exceptional surface finishes for stainless steels and nickel based alloys. The Harrison C-75 process was developed and is utilized by Harrison Electropolishing.

The Harrison C-75 process was conceived in 1980. It was originally designed to meet the needs of the petrochemical industry. The Harrison C-75 electrochemical process delivers a smooth, cleanable surface, which reduces product adhesion and buildup. Through its development and implementation, a list of Harrison C-75 advantages has been cultivated and realized.

Since the early 1980s, the Harrison C-75 electropolishing process has realized its place in a wide range of industrial and high purity applications. With its list of advantages and surface improvements, the Harrison C-75 electropolishing process has satisfied the most stringent requirements of today's industries and has been utilized overseas in five continents.

Harrison C-75 Procedure

The Harrison C-75 polishing process begins with mechanical finishing. Harrison C-75 Electropolishing offers the highest quality precision mechanical polishing available in our industry. Our process development team understands the many industrial applications for precision polished parts and has developed proprietary processes and tools. Our unique process combines precision mechanical polishing techniques, the latest polishing equipment, several proprietary components and over 30 years of experience to deliver an exceptionally smooth surface finish required for the Harrison C-75 process.

The second stage of the Harrison C-75 polishing process incorporates electrochemical polishing which is commonly referred to as electropolishing. Electropolishing is an electrochemical process by which surface material is removed by anodic dissolution. Electropolishing removes material starting with the high points within the microscopic surface texture. By removing these points, electrochemical polishing will improve the surface finish, leaving a smoother and more reflective surface.

This tailored process produces exceptional surface finishes for stainless steels and nickel based alloys. The benefits of the Harrison C-75 electropolishing process include:

Aesthetic Appeal
Improved Cleanability
Improved Corrosion Resistance
Improved Surface Finish
Reduce Product Adhesion

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More to Know

Frequently Asked Questions

What is the Harrison C-75 process?

Harrison C-75 is a proprietary process developed by Harrison Electropolishing that combines mechanical and electrochemical polishing to produce exceptionally smooth, cleanable surfaces on stainless steels and nickel-based alloys.

What problems does C-75 solve?

It reduces product adhesion and buildup, improves cleanability and transfer rates, and can extend cleaning intervals and reduce shutdowns on process equipment such as conveyor screws and rotary valves.

What materials work with C-75?

Stainless steels and nickel-based alloys are the primary candidates. Suitability depends on part geometry and the surface-performance goal.

How is C-75 different from standard electropolishing?

C-75 layers mechanical refinement with electrochemical polishing to reach finishes and adhesion-reduction results beyond what either process delivers alone.

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Electropolishing

Harrison Electropolishing, the Leading Electropolishing, Passivation, Oxygen Cleaning & Mechanical Polishing Company World Wide.

Electropolishing is an electrochemical process by which surface material is removed by anodic dissolution. Electropolishing removes surface material, beginning with the high points within the microscopic surface texture. By removing these points, the electropolishing process will improve the surface finish of a metal such as stainless steel, nickel, and Hastelloy, leaving a smoother and more reflective surface. Common parts and components electropolished include tanks, piping, fittings, rods, discs, large parts & surfaces, and more.