How to Clean Stainless Steel
What Is Stainless Steel?
Unlike iron or steel that readily corrodes, stainless steel contains additional metals like chromium and nickel. Don't confuse stainless steel with galvanized steel--galvanized steel is plain steel with a layer of zinc deposited on the surface.
While there are many different "series" (different compositions) of stainless steel, two of the most common ones you'll see in the food service industry are 400 series and 300 series.
- 400 Series stainless steel contains chromium
- 300 Series stainless steel contains both chromium and nickel for superior durability and corrosion resistance
Without getting too technical, adding these metals in specific percentages to the steel itself change its makeup all the way down at the atomic level, and form an invisible film on the surface, which protects the metal against corrosion.
Because this film is only millionths of an inch thick, it can be damaged if abused. Three basic things can damage this protective layer and allow corrosion to take hold:
- Mechanical Abrasion--Anything that can scratch the steel's surface including steel wool, wire brushes, and scrapers
- Deposits & Water- -Hard water left sitting on the surface will leave water spots and can break down the layer of protection, as well as food deposits
- Chlorides--Found in water, food, table salt, but mainly found in many household and industrial cleaners
Care & Cleaning Tips for Work Tables, Sinks, and Equipment
- Use the right cleaning tools: Soft cloths,microfiber sponges, or plastic scouring pads are best. Avoid using scrapers, wire brushes, steel wool, or anything else that might scratch the surface.
- Clean with the polish lines: Stainless steel usually has a "grain" that you can see running in one direction or another. If you can see the lines, it's always best to scrub or wipe parallel to them. This is especially important if you do have to use something more abrasive than a cloth or wiper.
- Use the right cleaning chemicals: The best cleaner for stainless steel will contain alkaline, alkaline chlorinated, or non-chloride chemicals.
They not only clean and shine, but also help enhance the protective film. It's also a good idea to clean and sanitize frequently, using chemicals at the required strength. Ready-to-use sanitizer that won't damage stainless steel and is great for sanitizing work tables, and other surfaces around your commercial kitchen. Cleaning stainless steel regularly also prevents dirt or spills from drying onto the surface so you won't have to work as hard to clean anyway!
For other types of cleaners including citrus-based cleaners, bleach, and deliming agents, the key is to rinse them off thoroughly after use.
- Minimize the impact of hard water: If you have hard water, having a water softening system is probably the best option, but may not be practical in every situation. If you have hard water and aren't able to treat it throughout your entire facility, it's a good idea to not let water stand on your stainless steel surfaces for extended periods.
What do I do if I start to notice rust on my stainless steel equipment?Even with the proper cleaning and care, rust spots can occur over long periods of time. Follow the steps below to help restore your stainless steel products.
1. Determine the cause of corrosion. Whether it is due to mechanical abrasions, deposits, water, or chlorides/chemicals, it is necessary to determine what is causing the corrosion so you can correct your care and cleaning to avoid it in the future.
2. Use a scratchless pad, to remove the rust off the product. Do not apply any moisture or chemicals to the pad - just use the pad on the metal. Rub gently with the grain of the stainless steel.
Pro Tip: Test out the pad in a small, hidden spot of stainless steel until you get the "feel" for the amount of pressure to apply.
3. Apply a cleaning paste, with a soft cloth or microfiber towel to the affected area.
4. Dampen a separate area of the towel and remove any excess paste.
5. Be sure to frequently use a stainless steel safe polish to help remove any corrosive elements on the stainless steel and allow the passive layer to be restored. And remember, thoroughly wash any food-contact surfaces after using Spiffy Shine in your kitchen.
Stainless Steel Flatware Care
These items will last longer and look better if you keep the following tips in mind:
- Remove all food remnants from your flatware as soon as possible.
- Presoak for approximately 20 minutes. Concentrated powder (a little goes a long way) penetrates and saturates soils for more effective removal in your wash cycle.
- Don't forget to change your soaking solution after a few cycles; otherwise chemicals and food particles will accumulate and reduce its effectiveness
- Like all stainless steel, hard water and detergents high in chlorides will eventually break down the protective film. As long as you follow proper presoaking and drying procedures and your dish machine is rinsing correctly, any high quality detergent and sanitizer should not harm your flatware.
Stainless Steel Cookware Care
Most of the general tips for stainless steel care also apply to stainless steel cookware. A few other points:
- Direct contact with salt can cause pitting--always add salt to boiling water to dissolve it.
- Plastic, wooden or silicone/rubber utensils will minimize damage to the surface.
- Cookware will last longer if washed by hand with hot soapy water. Always scrub in the direction of the metal grain.
- Season cookware before the first use; repeat as often as needed.