Mirror Buffed Process

Mirror Buffed Process

 

 

What is Mirror Buffed?

Polishing and buffing are finishing processes for smoothing a work piece's surface using an abrasive and a work wheel. Technically polishing refers to processes that use an abrasive that is glued to the work wheel, while buffing uses a loose abrasive applied to the work wheel. Polishing is a more aggressive process while buffing is less harsh, which leads to a smoother, brighter finish. A common misconception is that a polished surface has a mirror bright finish, however most mirror bright finishes are actually buffed.

The removal of oxidization (tarnish) from metal objects is accomplished using a metal polish or tarnish remover; this is also called polishing. To prevent further unwanted oxidization, polished metal surfaces may be coated with wax, oil, or lacquer. This is of particular concern for copper alloy products such as brass and bronze.

The term chem-mechanical was coined to describe action of corrosive slurry on silicon in a polishing process. Multiple rotating heads, each studded with silicon wafers, get forced against a large rotating buffing pad, which is bathed in corrosive slurry. Material removal at elevated temperature progresses first through oxidation, then through oxide removal by abrasion. This cycle repeats with each rotation of a head. Potassium Hydroxide and Silox (white paint-base) can be combined with deionized water to form such a slurry.

 

When To Use Buffing

Polishing is often used to enhance the looks of an item, prevent contamination of instruments, remove oxidation, create a reflective surface, or prevent corrosion in pipes Inmetallography and metallurgy, polishing is used to create a flat, defect-free surface for examination of a metal's microstructure under a microscope. Silicon-based polishing pads or a diamond solution can be used in the polishing process.


Process

The condition of the "metal" at hand determines what type of abrasive will be applied. The first stage, if the material is unfinished, starts with a rough abrasive (perhaps 60 or 80 grit) and each subsequent stage uses a finer abrasive, such as 120, 180, 220/240, 320, 400 and higher grit abrasives, until the desired finish is achieved. The rough (i.e. large grit) passes remove imperfections within the metal surface like pits, nicks, lines and scratches.

The finer abrasives leave progressively finer lines that are not visible to the naked eye. To achieve a #8 Finish (Mirror) it requires polishing and buffingcompounds, polishing wheels and high speed polishing machines or other machine tools that can be used for polishing, like an electrical drill. Lubricants like wax and kerosene may be used as lubricating and cooling media during these operations, although some polishing materials are specifically designed to be used "dry." Buffing may be done by hand with a stationary polisher or die grinder, or it may be automated using specialized equipment

When buffing there are two types of buffing motions: the cut motion and the color motion. The cut motion is designed to give a uniform, smooth, semi-bright surface finish. This is achieved by moving the workpiece against the rotation of the buffing wheel, while using medium to hard pressure. The color motion gives a clean, bright, shiny surface finish. This is achieved by moving the workpiece with the rotation of the buffing wheel, while using medium to light pressure.

When polishing brass,(A softer metal) there are often minute marks in the metal caused by impurities. To smooth out the finer marks, the surface is polished with a very fine (600) grit, copper plated, then buffed to a mirror finish with an airflow mop.

Polishing operations for items such as chisels, hammers, screwdrivers, wrenches, etc., are given a fine finish but not plated. In order to achieve this finish four operations are required: roughing, dry fining, greasing, and coloring. Note that roughing is usually done on a solid grinding wheel and for an extra fine polish the greasing operation may be broken up into two operations: rough greasing and fine greasing. However, for inexpensive items money is saved by only performing the first two operations.

Polishing knives and cutlery is known as fine glazing or blue glazing. Sand buffing, when used on German silver, white metal, etc., is technically a buffing operation because it uses a loose abrasive, but removes a significant amount of material, like polishing.

We Export To


Call today, and find out why Steel Tubes India is the choice for so many users of chrome plated fasteners

Tel: +(91)-(22)-61432000 or send an Email to stindia@stindia.com


Winner Of

Accreditations

Stainless Steel Fasteners

Duplex Steel Fasteners

Nickel Alloy Fasteners

Inconel Fasteners

Hastelloy Fasteners

Nitronic Fasteners

Monel Fasteners

Titanium Fasteners

Other Special Material

Quick Enquiry

Testimonial

  • Associated with Steel tubes for over 10 years. During this time they Supplied various types of steel fasteners to us even sometime in very short notice, but this time we were required custom Hex bolts in Hastelloy c276 material in maximum 10 day here in Germany, i knew that it was next to impossibe, but i appriciate that they made it possible & deliverd exactly as per our drawing in 8 days, they are superb as a hastelloy hex bolts Manufacturers, They have experienced & Good team as well excellent logistic access.

    Dr. Antonella M-Pochtler
    Cheif Consultant

    Btc Speciality Chemical Distribution Gmb

  • Procuring PTFE coated Stainlesss Steel fasteners in high quality grades like SS 304,316L,317L & ss 904L and must say they never compromised with quality in last 8 years,special thanks to team they have knowledgeable about their work. Invoicing is always prompt and detailed. Quotes are received in minimum time. It is always great to work with Steel Tubes India for such a long time and know that loyalty always counts”

    Paul Jackson
    Production Head

    Ambic Equipment Limited

We Export To