Electroless nickel plating (ENP) is a chemical process that deposits an even layer of nickel-phosphorus on the surface of a metal part without the use of electricity. The water solution contains nickel salt and a reducing agent containing phosphorus. Electroless nickel is a viable solution for steel, stainless steel, Inconel, copper/brass, aluminum, zinc diecast, and tungsten parts. ENP is used in the agricultural machinery industry to protect farm machinery. This process protects food processing equipment so that the equipment can withstand extreme hot and cold temperatures. It is used in aviation to protect the thousands of parts that keep our planes flying. ENP treatment protects heavy-duty construction and oil and…

Anodizing is the process that makes a non-ferrous metal, such as aluminum, corrosion-resistant and non-conductive. The process can also be used to color a part. Some anodized parts have a hardness equal to the strongest of steels and iron. Anodized parts have longer life and typically don’t chip. The oxide surface will not decompose and cause health concerns. Anodizing protects aircraft components from corrosion and from undesired electric currents. Since anodized parts can withstand high heat, anodizing is also a preferred process of the food service industry. Cleaned parts are submerged into an electrolyte solution that is set to the right temperature. A current is applied to the parts that…

Stainless steel parts have a natural layer of oxide that provides limited protection for the parts. However, “free iron” can become attached to the part and overwhelm the oxide layer. The parts begin to rust and, eventually, lose their structural integrity. Passivation both eliminates the free iron and strengthens the oxide layer, making the part more “passive”, that is less accepting of an assault by free iron. This increases the usable life of the part and reduces the likelihood of catastrophic failure and associated death and injuries. Passivation also significantly improves a part’s appearance. It also promotes the optimal flow of electricity. F.M. Callahan & Son has specialized in passivating…