Vulcan C24EO3 Manuel d'utilisateur télécharger pdf (Page 15)

— 15 —

C24EO SERIES STEAMER

STAINLESS STEEL EQUIPMENT CARE

AND CLEANING

Contrary to popular belief, stainless steels

ARE susceptible to rusting.

Corrosion on metals is everywhere. It is

recognized quickly on iron and steel as unsightly

yellow/orange rust. Such metals are called

“active” because they actively corrode in a

natural environment when their atoms combine

with oxygen to form rust.

Stainless steels are passive metals because

they contain other metals, like chromium,

nickel and manganese, that stabilize the atoms.

400 series stainless steels are called ferritic,

contain chromium, and are magnetic; 300 series

stainless steels are called austenitic, containing

chromium and nickel; and 200 series stainless,

also austenitic, contains manganese, nitrogen

and carbon. Austenitic types of stainless are

not magnetic, and generally provide greater

resistance to corrosion than ferritic types.

With 12 to 30% chromium, an invisible passive

ﬁ lm covers the steel’s surface acting as a shield

against corrosion. As long as the ﬁ lm is intact

and not broken or contaminated, the metal is

passive and stainless. If the passive ﬁ lm of

stainless steel has been broken, equipment

starts to corrode and starts to rust.

Enemies of Stainless Steel

There are three basic things which can break

down stainless steel’s passivity layer and allow

corrosion to occur.

1. Mechanical abrasion.

2. Deposits and water.

3. Chlorides.

Mechanical abrasion means those things that

will scratch a steel surface. Steel pads, wire

brushes and scrapers are prime examples.

Water comes out of the faucet in varying degrees

of hardness. Depending on what part of the

country you live in, you may have hard or soft

water. Hard water may leave spots, and when

heated leaves deposits behind that if left to sit, will

break down the passive layer and rust stainless

steel. Other deposits from food preparation and

service must be properly removed.

Chlorides are found nearly everywhere. They

are in water, food and table salt. One of the worst

chloride perpetrators can come from household

and industrial cleaners.

So what does all this mean?

Don’t despair!

Here are a few steps that can help prevent

stainless steel rust.

1. Use the proper tools.

When cleaning stainless steel products, use

non-abrasive tools. Soft cloths and plastic

scouring pads will not harm steel’s passive

layer. Stainless steel pads also can be used

but the scrubbing motion must be in the

direction of the manufacturers’ polishing

marks.

2. Clean with the polish lines.

Some stainless steel comes with visible

polishing lines or grain. When visible lines

are present, always scrub in a motion parallel

to the lines. When the grain cannot be seen,

play it safe and use a soft cloth or plastic

scouring pad.

3. Use alkaline, alkaline chlorinated or non-

chloride containing cleaners.

While many traditional cleaners are loaded

with chlorides, the industry is providing

an ever-increasing choice of non-chloride

cleaners. If you are not sure of chloride

content in the cleaner used, contact your

cleaning supplier. If your present cleaner

contains chlorides, ask your supplier if

they have an alternative. Avoid cleaners

containing quaternary salts; it also can attack

stainless steel and cause pitting and rusting.

1 2 ... 10 11 12 13 14 15 16 17 18 19 20 ... 47 48

Commentaires sur ces manuels

Pas de commentaire

Vulcan C24EO3 Manuel d'utilisateur Page 15

Commentaires sur ces manuels

Produits connexes et manuels pour Cuiseur à vapeur Vulcan C24EO3