The surface of the article is cleaned as pre-plating basis metal
, pre- and post-coating treatment is given to reduce the risk of hydrogen embrittlement.
Dewetting is a condition that results when molten solder coats a surface and then recedes, leaving irregularly shaped mound(s) of solder separated by areas that are recovered with a thin film of solder and with the basis metal
* In the case of the 42MoCr11 steel, analysing the combination layer microstructure it was noticed the emersion of the continuous combination layer with limit of separation towards the basis metal
. The depth of this layer varies between 1 [micro]m (1h / 450 [degrees]C) and 12 [micro]m (16h / 550 [degrees]C); the metal structure remained unchanged, with globular carbides.
The IPC-T-50 Terms and Definitions document defines solder wetting as "the formation of a relatively uniform, smooth, unbroken and adherent film of solder to a basis metal