Localized blistering of the plating is a common quality problem in the production of barrel nickel plating of iron parts, and the following are some of the common causes that may lead to such failures:
1. Inadequate pre-treatment: If the cleaning and pre-treatment (degreasing, pickling, activation) steps of the iron parts before plating are not adequate, grease, oxidized layer or other contaminants may remain on the surface, which may prevent the formation of a good adhesion between the nickel layer and the iron surface, leading to blistering.
2. Problems with plating solution: If the plating solution is not stirred evenly, the temperature is not properly controlled, or a good quality tumbling nickel brightener is not used, the quality of nickel plating layer may be affected, resulting in blistering.
3. Problems with electroplating equipment: If the rotation of the electroplating tank is uneven, or the electrode distribution is not uniform, it may lead to localized high current density, forming uneven thickness of the plated layer or localized too fast growth of the plated layer, which may also cause blistering.
4. Excessive current density: If the current density used in barrel nickel plating is too high, it can lead to the deposition of the layer too fast, so that the air bubbles can not escape in time to be closed in the plating of the internal.
Ways to address these issues include:
1. Strengthen the pretreatment process to ensure that the surface of iron parts is thoroughly cleaned, improve the effect of pretreatment fluid and control the parameters of the pretreatment process.
2、Optimize the formulation of plating solution, use Bigely barrel nickel plating brightener, keep the plating solution clean, filter and replace the plating solution regularly.
3. Reduce the current density appropriately and adjust the stirring and electrode distribution in the plating process.
4. Inspect and maintain barrel equipment to ensure stable equipment operation and even plating of parts in the barrel.
Conclusion
After the blistering problem is found, the process should be adjusted in time to avoid continuing to produce inferior products. Doing a good job in each plating process beforehand will help to minimize blistering of the plated layer, and choosing the right brightener is one of them. You can use Bigely barrel nickel plating brightener, which has the ability to self-purification, which contains a special ingredient that can decompose organic impurities, so that there are fewer decomposition products in the bath, and the plating layer obtained has a dense structure and good flexibility.
Please feel free to contact us if you are interested in barrel nickel plating brightener.
