Stainless Steel Electropolishing Process

Introduction I.M.T.’s HN-SP process for stainless steel polishing provides good polishing effect and brightness to stainless steel surface. It is of easy operation, low cost and strong stability. Electropolishing is a reverse plating procedure that causes the electrochemical removal of metal...

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Introduction

I.M.T.’s HN-SP process for stainless steel polishing provides good polishing effect and brightness to stainless steel surface. It is of easy operation, low cost and strong stability.

Electropolishing is a reverse plating procedure that causes the electrochemical removal of metal impurities (including carbon, silica, and free iron) from a stainless steel surface. The goal is a smooth surface, devoid of burrs or crevices that attract and trap contaminants.

One of the benefits of electropolishing for stainless steel is that it removes iron from the surface and enhances the chromium/nickel content for the most superior form of passivation for stainless steel. Electropolishing also provides a clean and smooth surface that is easier to sterilise, while improving the surface finish by levelling micro-peaks and valleys. This methodology is able to polish areas that are inaccessible by other polishing methods.

Another benefit of electropolishing is that it removes a small amount of material (typically 20-40 micrometre in depth in the case of stainless steel) from the surface of the parts, while also removing small burrs or high spots. It can be used to reduce the size of some parts when necessary.


Item: HN-SP


Advantages

1. Good polishing effect, good brightness of workpiece surface;

2. Convenient operation, low cost, strong stability;

3. Suitable for electropolishing on stainless steel surface.


Bath Composition and Working Conditions

Bath composition and working conditions

Range of application

General dosage of making up

phosphoric acid

500 ~ 600 mL/L

600 mL/L

sulfuric acid

200 ~ 250 mL/L

200 mL/L

HN-SP additive

80 ~ 150 mL/L

100 mL/L

temperature

40 ~ 80℃

50℃

anode current density

50 ~ 150 A/d㎡

100 A/d㎡

time

3 ~ 8 min

3min

Cathode plate

Lead plate or Tin-Lead alloy plate


Packing

A plating process includes at least one type of chemical additives.

Standard package is net 25kg/drum. Packed in plastic drum. 24 drums/pallet.

Some additives needs special package and will be specified in quotation sheet.


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