Corrosion

The EZBoiler Stove Outdoor Furnace is made out of mild steel, and as you know mild steel left untreated will corrode.

The following are five basic steps to maintain your stove and extend it’s life:

Grounding Rod
A properly installed grounding system that will protect people from electrical shock, help safeguard expensive electronic equipment, prevent electrolysis, limit neutral-to-ground voltage and satisfy the NEC along the way.

Electrolysis of water is the decomposition of water (H2O) into oxygen (O2) and hydrogen gas (H2) due to an electric current being passed through the water.

Use only a 4GA wire or larger wire with proper grounding clips. Grind paint away were attached to stove to get a solid electrical connection.

Sodium Nitrate
Corrosion troubles in low pressure heating boilers often occur unnecessarily. Steel does not corrode appreciably in dry air, but only in the presence of moisture. Likewise, steel will not corrode in clean, alkaline, freshly-boiled water, if air is kept away.

Remove air from water, tests show that air can be removed by heating both the fill-up water and the regular feed water. After every filling, a boiler should be heated to bring the water to temperature and the steam so produced should be vented off to carry the released gases out of the boiler. Before this, water treating chemicals should be added so as to get good mixing.

In hot water systems, production of steam is not desirable, so the water temperature should be raised to 180° to 200° F for a short time to allow most of the air to be driven off through vents.

One method of removing oxygen from boiler water is through the use of an oxygen-absorbing chemical such as sodium nitrate.

Don’t drain chemicals, many boiler owners completely drain their boilers once or twice a season under a mistaken belief that the water in the boiler is dirty. Actually, this practice, and the practice of periodically draining small quantities of water from the boiler, should be discouraged. It causes loss of chemicals and requires make-up water, which brings in more oxygen. However, if additional chemicals are added each time to compensate for losses, little harm will be done.

We maintain the levels of Sodium Nitrate water treatment by requesting one water sample, from the water jacket, per year.  The test is free, we are checking the dilution of Sodium Nitrate so we can let you know when you need more.

Coals and Ash
Pulling the ash and coals to the front of the fire box before loading. Be sure to get right down to the fire box metal. This will aid in heat transfer to the water jacket and reduce corrosion.

Accumulations of soot on the fire box should be periodically removed. Soot attracts moisture; and air, moisture and steel together result in attack of the fire box. Cleaning may be daily, weekly or monthly, depending on the fuel used and the fuels and method of firing.

Many samples of scale removed from fire side surfaces have been found to be acid when mixed with water. The presence of this acid may cause the metal to eat away to eventual failure.

Off Season
Cover the chimney to prevent rain water from getting inside the fire box. Clean out all the ashes and optionally coat the exposed metal with a light coating of oil. This will protect the fire box from rusting in the off season.

Drain and Flush
You should drain and flush the stove every two years. Not only drain the stove of water but flush the tank with a garden hose to flush out and sledge buildup on the bottom of the water jacket. Refill the stove with water, adding Sodium Nitrate to the water to remove the oxygen.