MORPHOLOGY AND INTERNAL STRESSES OF NICKEL COATINGS FROM SULPHATE ELECTROLYTE WITH THE ADDITION OF ISONICOTINIC ACID

Issue 3(89) 2018
Pages 57-63

E.N. Narkevich, A.N. Frumkin Institute of Physical Chemistry and Electrochemistry
of RAS (IPCE of RAS), Moscow, Russian Federation

N.A. Polyakov, IPCE of RAS, Moscow, Russian Federation


Keywords: nickel-plating, Watts type bath, atomic force microscopy

http://www.doi.org/10.31615/j.corros.prot.2018.89.3-7 

 

The effect of isonicotinic acid additives on the morphology and internal stress is studied in nickel coatings obtained from a Watts-type nickel-plating electrolyte based on sulfuric acid. It is shown that the isonicotinic acid additive causing formation of bright nickel coatings also causes an increase in the internal stress in the deposits. High internal stresses in such coatings result in their cracking. The XPS technique is used to show that the additives of isonicotinic acid and/or products of its conversion are incorporated into the coatings.