IX. STAINLESS STEEL OVERVIEW
IX. a - INTRODUCTION:
Most Traulsen models are constructed with a high quality 430 series, 20 gauge stainless steel exterior finish (front, sides and doors). The interior finish on these same mod- els are constructed using 300 series stainless steel.
The stainless steel finish on Traulsen products should re- tain its appearance throughout the products usable life- time. However, some care is required to maintain this ap- pearance. The following paragraphs will provide a guide- line on proper care of the exterior/interior finish, as well as some suggestions on how to repair a finish which has been marred due to adverse environmental conditions or im- proper jobsite care.
IX. b - STAINLESS STEEL, HOW IT WORKS:
The process by which stainless steel retains its appear- ance is a result of its type of metal alloy. Steel is a compos- ite of metals combined in a specific industrial process. Stainless steel contains a high percentage of chromium, the addition of which provides both its appearance, and a microscopic surface layer protecting the steel underneath from corrosion. This external layer acts as a barrier, pre- venting typical oxidation of the steel. Remove this barrier, and the environment will eventually corrode the metal, marring its appearance.
IX. c - UNDERSTANDING THE CAUSES OF CORROSION: Corrosion to stainless steel can only be caused in one of four specific ways:
1)ABRASION
Abrasion can be caused during routine cleaning of the metal, either by use of an abrasive cleanser, or use of an abrasive device, such as a metal scouring pad. Abrasion can also be caused by contact with other hard surfaces, such as nearby equipment, walls or tools. Special care should be taken to position your unit properly to prevent accidental dents and scratches.
2)WATER
Water everywhere contains various deposits, or solids, which as the water drys or evaporates, can leave spots behind. The spots may eventually cause corrosion if not removed.
3)CHEMICALS OR WATER CONTAINING CHLORIDES Chlorides, such as found in water or many cleaning mate- rials are especially corrosive to stainless steel. Daily jani- torial duties, such a floor mopping, can splash water con- taining chlorinated cleansers against the front and sides of a Traulsen refrigeration product, resulting in corrosion. Avoid use of these on or around a Traulsen refrigeration product if at all possible.
4)PROLONGED CONTACT WITH FOOD PRODUCT
Many food products, such as milk and carbonated sodas,
IX. c - UNDERSTANDING THE CAUSES OF CORROSION: contain acids which may damage the protective layer of stainless steel. All food and beverage spills should be cleaned up promptly to avoid possible stains and corro- sion.
X. CARE OF STAINLESS STEEL
X. a - USING THE PROPER TOOLS:
Use of proper cleaning materials will do much to prolong the appearance of your Traulsen refrigeration product. We particularly encourage the use of either plastic scouring pads or soft cloths for cleaning stainless steel.
Soft nylon scouring pads can also be used, however care has to used to insure that all scrubbing is done in the di- rection of the metals “GRAIN.” Because metals are chrystalline in nature, when they are in a solid state the individual ions line up to form visible grain lines. Use of a soft nylon scouring pad in a direction opposite of the grain will mar its luster. Always do so “PARALLEL” to the grain.
There are several types of tools which should NEVER BE USED when cleaning stainless steel, these include:
•WIRE BRUSHES
•METAL SCOURING PADS
•SANDPAPER
•SCRAPERS & PUTTY KNIVES
Use of any of these tools will result in scratches or removal of the stainless steel’s protective layer, which will eventu- ally lead to corrosion and rust.
X. b - USING THE RIGHT CLEANSER:
Avoid all cleaning products containing chloride ingredients. Use of a cleanser specifically designed for stainless steel is highly recommended. You may find yourself in a situa- tion where you are uncertain if a particular cleaning prod- uct contains any chlorides. If unsure, its probably best to just assume that it does and avoid its use in cleaning a Traulsen refrigeration product.
Also to be avoided are cleaning products which contain “QUATERNARY SALTS.” These salts can literally attack the stainless steel’s protective layer, leading to corrosion and pitting of the steels surface.
After cleaning, it is important to always rinse the cleaned area thoroughly with cool, clean water (do not use hot wa- ter) and wipe completely dry using a paper towel or soft absorbent cloth.
Use of cleaning products designed for use on stainless steel, in conjunction with the proper tools, as outlined above will help retain the appearance of your Traulsen refrigera- tion product for years and years.
