US 11,732,375 B2
Iron tungsten coating formulations and processes
Vijaykumar S. Ijeri, Bangalore (IN); Om Prakash, Bangalore (IN); Stephen P. Gaydos, St. Louis, MO (US); Nitin Pandurang Wasekar, Hyderabad (IN); Govindan Sundararajan, Hyderabad (IN); and Dameracharla Srinivasa Rao, Hyderabad (IN)
Assigned to The Boeing Company, Chicago, IL (US)
Filed by The Boeing Company, Chicago, IL (US)
Filed on Nov. 12, 2021, as Appl. No. 17/525,308.
Application 17/525,308 is a division of application No. 15/618,850, filed on Jun. 9, 2017, granted, now 11,208,731.
Prior Publication US 2022/0074066 A1, Mar. 10, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. C25D 3/56 (2006.01); C25D 5/18 (2006.01); C25D 5/00 (2006.01)
CPC C25D 3/562 (2013.01) [C25D 5/18 (2013.01); C25D 5/627 (2020.08); C25D 5/611 (2020.08)] 20 Claims
OG exemplary drawing
 
1. An electrolyte solution, consisting of:
an aqueous medium;
a divalent iron salt in an amount ranging from about 0.05 to about 0.5 mol per liter of the electrolyte solution;
an alkali metal citrate in an amount ranging from about 0.05 to about 2 mol per liter of the electrolyte solution;
a tungstate salt comprising an alkali metal tungstate in an amount ranging from about 0.1 to about 1.5 mol per liter of the electrolyte solution;
citric acid in an amount ranging from about 0.01 to about 1 mol per liter of the electrolyte solution; and
sodium hydroxide, potassium hydroxide, sulfuric acid, or a combination thereof, wherein the electrolyte solution has a pH of about 3 to about 12.