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-13-
VIII. a - INTRODUCTION
All Traulsen R & A Series Refrigerator, Freezer, Dual-Temp
and Heated Cabinet 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
R-Series models are constructed using 300 series stainless
steel (anodized aluminum is used for A-Series).
The stainless steel finish on Traulsen R & A Series should
retain its appearance throughout the products usable
lifetime. However, some care is required to maintain this
appearance. The following paragraphs will provide a
guideline 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 improper jobsite care.
VIII. b - STAINLESS STEEL, HOW IT WORKS
The process by which stainless steel retains its appearance
is a result of its type of metal alloy. Steel is a composite 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, preventing
typical oxidation of the steel. Remove this barrier, and the
environment will eventually corrode the metal, marring its
appearance.
VIII. c - 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 dries 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 materials
are especially corrosive to stainless steel.Daily janitorial
duties, such a floor mopping, can splash water containing
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,
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 corrosion.
VIII. d - 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 be used to insure that all scrubbing is done in the direction
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 eventually
lead to corrosion and rust.
VIII. e - 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 situation
where you are uncertain if a particular cleaning product
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
water) and wipe completely dry using a paper towel or soft
absorbent cloth.
VIII. STAINLESS STEEL OVERVIEW
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