Monel Blind rivets
Nickel-copper, also known as Monel1 or Nicorros2, is a material offering the best possible strength and corrosion resistance properties. Thanks to its outstanding resistance to salts and acids and similar strength to stainless steel, NiCu is often used for equipment in the offshore, chemical and food industry.
A perfect rivet in all respects
Outstanding
resistance to
salts and acids.
Similarly high
strength to
stainless steel.
Extruded from
wire.
Captive
breakstem.
Rivet sleeve
additionally
galvanised!
A4 mandrel!
Corrosion behaviour of nickel/copper blind rivets (NiCu30Fe)
Tap water
NiCu30Fe has excellent corrosion resistance in distilled, hard or soft water.
Salt water
NiCu30Fe has very good resistance to seawater. In stationary seawater, slight surface corrosion may occur due to the accumulation of oxygen-forming marine organisms. Neutral and alkaline salts High corrosion resistance when used in neutral and alkaline salt solutions.
Acid salts
NiCu30Fe has good corrosion resistance to salt solutions such as zinc chloride, ammonium sulphate, aluminium sulphate, aluminium chloride, etc.
Oxidising acid salts
NiCu30Fe is not very resistant to most oxidizing acid salts such as iron(III) chloride, silver nitrate, mercuric chloride and acids with oxidizing constituents.
Oxidising alkaline salts
Hypochlorites are the only common alkaline salts with a strong corrosive effect on NiCu30Fe.
Mineral acids
NiCu30Fe has good corrosion resistance to all acids with the exception of strong oxidizing acids. In air-free acid, a temperature increase is of no importance. In air-saturated acid, the corrosion effect is strongest at about 85 °C. Good resistance to sulphuric acid, hydrochloric acid, hydrofluoric acid, etc. can therefore be expected. Phosphoric acid and hydrogen sulphides have no corrosion effect under the above conditions.
Oxidising acids
NiCu30Fe has only limited suitability for contact with strong oxidizing acids. Considerable corrosion can already occur, for example, in 1 % nitric acid with strong movement of the acid.
Organic acids and compounds
NiCu30Fe has good corrosion resistance to all common acids. Practically no corrosion is caused by neutral and alkaline organic compounds. These acids are e.g. acetic acid, fruit or food acids, fatty acids etc.
Alkalines
NiCu30Fe is resistant to most alkaline solutions. Practically no corrosion is caused e.g. by caustic soda in concentrations up to 50 %. In a caustic soda evaporator the NiCu30Fe parts lasted ten years without significant corrosion, whereas the same parts made of steel had to be replaced after one year.
Moist and dry gases
NiCu30Fe is corrosion-resistant to all common dry gases. Dry chlorine gas, for example, has no corrosive effect on NiCu30Fe. This metal alloy is resistant to the corrosive and erosive effect of steam at temperatures up to 400 °C. In contrast to many other alloys, NiCu30Fe showed neither fatigue nor did it become brittle on prolonged exposure to superheated steam.