Brush Plating for repair of Type 316 Stainless Steel Urea Reactor

A. I doubt any of the most common brush plated metals like dense nickel, chrome or cobalt will match the performance of SS-316 in such a critical application and harsh environment. Precious metals like gold, platinum, or palladium can resist chemical attack but price and abrasion are always economic and technical handicaps. Another point is that proper activation of the 316 substrate to obtain the required adhesion will be really difficult, more so if it is severely corroded. I would explore electroforming of a nickel sleeve (it can be as thick as several millimeters). Other alternatives may include High Velocity Oxy Fuel (HVOF) and Electro Spark Deposition (ESD) depending on the extent of the damage and other particular restrictions.
G. Marrufo-Mexico