Influencing Factors on Mechanical Properties of Nickel Sulfamate Layer

Tensile stress

When the temperature of the plating solution is lower than 49°C, it decreases with the increase of the temperature of the plating solution, and when the temperature of the plating solution is above 49°C, it increases slowly with the increase of the temperature

Increase with the increase of bath pH

Decreases with increasing cathode current density

Decrease slightly with increasing nickel content

Elongation

When the bath temperature is 43°C, it reaches the maximum value

Decrease with the increase of bath pH

Increased with the increase of cathode current density

Slightly increased with the increase of nickel content

Slightly increased with the increase of chloride content

hardness

In the process range, it increases with the increase of temperature

Increase with the increase of bath pH

When the cathode current density is about 13A/dm3, it reaches the lowest value

Decrease slightly with the increase of Ni2+ concentration

Slightly decreased with the increase of chloride content

Internal stress

Decreases with increasing bath temperature

When the pH of the plating solution is 4.0-4.2, it reaches the lowest value

increases with the increase of cathode current density

Within the specified pH range, it will not be affected by pH changes

Within the process range, the change of Ni2+ content in the bath has little effect on it

significantly increased with the increase of chloride content