Solving the Problem of Oxidation of Metal Markers in High-Temperature Environments

In a high-temperature environment, metal signs are susceptible to rust, which can affect both their lifespan and appearance.To deal with the problem of oxidation, it offers three solutions: protective coatings, material upgrades, and daily maintenance. It also includes information on preventing rust on stainless steel signs and preventing oxidation on aluminum signs, to help extend the life of metal signs in high-temperature environments.

Why do metal markers oxidize?

Metal nameplates, like frying pans over a fire, evaporate their surface moisture, and the metal comes into intimate contact with oxygen in the air.This is especially true in coastal areas or industrial zones, where salt spray and acidic substances accelerate the chemical reaction.I remember that last year a customer's stainless steel nameplate, which was installed on the door of a hotel in Sanya, was so corroded after only six months that the writing was unreadable. This is a typical case of oxidation.

Three pieces of practical protection.

Giving metals a protective suit.

The most commonly used physical methods of protection are spray painting and electroplating.It is recommended that people choose polyurethane coatings. These coatings are like a gas mask for metal, able to withstand 80 ° C without peeling off.When we do markings on factory equipment, we always apply two coats of primer, letting it dry for 20 minutes between coats, which creates a more dense protective layer.

Use a different material that is more resistant to damage.

Although 304 stainless steel is common, it is not good enough for use in a chemical plant.Many customers are now using 2205 duplex stainless steel, which has twice the corrosion resistance of 316L in a 40 ℃ + high salt fog environment.If you have a large budget, you can consider titanium alloy. Last year we made a sign for an offshore drilling rig out of this material, and after three years it looks just as good as the day it was made.

Daily maintenance is a must.

Don't think that once you've done the job, you can just forget about it! Every three months, use a soft cloth dipped in neutral detergent to clean the surface, and pay special attention to cleaning the dust that accumulates in the seams.When you discover small scratches, you have to paint them over right away, otherwise oxidation will spread rapidly from them.Last year one property management company failed to deal with a scratch in time, and the whole sign ended up rusted beyond repair.

Special handling techniques.

Don't throw away a rusty sign just because it looks old.First use 120-grit sandpaper to remove the rust, remembering to work in the direction of the metal grain.Then the residue is neutralized with oxalic acid, and the surface is dried.Last year, I dealt with a metal menu board from a hot pot restaurant that had been corroded by steam. After we followed these steps and repainted it, it has been in use for over a year without any problems.

Choosing the right location is important.

Try to avoid putting metal signs directly above heat sources or in dead air pockets.For example, the sign for the serving window in a kitchen should be mounted on the side wall, at least one meter away from the steam vent.Last year, when we were renovating a fast-food restaurant chain, we moved the fire extinguisher indicator from above the steamer to the side corridor, and the problem of oxidation was reduced by 70 %.