Stress in Metal Deposits

Macrostress can be of two types tensile and compressive. The first tends to compress the substrate, while the second tends to expand it. They are arbitrarily given a negative and a positive sign, respectively. 

Finally, according to its origin, the stress can be extrinsic or intrinsic, depending on whether it is caused by the effect of the substrate upon the deposited layer or it appears in the layer independently of the substrate. 

Stress reflects all the complexity of influences of various factors on formation of metal plates by electrodeposition and has, therefore, been the subject of extensive studies they cover effects of substrate, plating solution composition, pH, deposit thickness, current density, or overpotential, deposition temperature. Detailed reviews are available.  

Types of Stress Produced in Deposits of Different Metals 

Metal Group of periodic chart Melting point rc) Sign of stress Mode of changing the sign 

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