E

Edge Rolling (Edge Conditioning)
Rolling a strip of steel to smooth the edges. By removing the burr off the coil, it is safer for customers to manipulate.

Electric Arc Furnace (EAF)
Steelmaking furnace where scrap is generally 100% of the charge. Heat is supplied from electricity that arcs from the graphite electrodes to the metal bath. Furnaces may be either an alternating current (AC) or direct current (DC). DC units consume less energy and fewer electrodes, but they are more expensive.

Electric Resistance Welded (ERW) Pipe
Pipe made from strips of hot-rolled steel which are passed through forming rolls and welded. While seamless pipe is traditionally stronger and more expensive than comparable ERW pipe, ERW technology is improving and the technique now accounts for approximately 48% of OCTG shipments by tonnage.

Electrical Steel
(See Silicon Electrical Steel )

Electroplating
A batch process used to produce a zinc coating on manufactured articles. These may be functional (for corrosion protection) or decorative coatings. Electric current is used to force the deposition of negatively charged zinc ions from an acid solution onto the positively charged cathode, which is the article to be coated. Produces thin coatings generally less than 10 um (0.4 mils) thick.

Electrogalvanizing
A continuous process used to produce a zinc coating on steel sheet by electroplating. Both sulfuric or hydrochloric acid solutions are used. The most common method uses sulfuric acid with insoluble anodes. Produces thin coatings generally less than 10 um (0.4 mils) thick.