After high-phosphorus electroless nickel plating on aluminum alloy, what should the electroplating factory do to know whether the bonding strength of the coating is good or not? What factors can affect the bonding strength of the coating? To answer these questions, let's introduce the relevant methods and how high-phosphorus electroless nickel solution affects the quality of the coating.
① Bending test
The sample is wound 180° along a core axis with a minimum diameter of 12mm or four times the thickness of the sample, and inspected with a 4x magnifying glass. If there is any peeling of the coating, it indicates poor bonding strength of the coating; otherwise, the opposite is also true. There is one point to note here, that is, the cracking of the coating on the bending and stretching surface should not be regarded as poor bonding strength of the coating.
② Thermal shock test
For different base metals, the parts coated with electroless nickel plating layer are heated in the furnace for 1 hour in accordance with the relevant requirements of the table. When the workpiece is quenched in water at room temperature, the coating should not bubble or peel off. Please note that if this test method has an adverse effect on the mechanical properties of the parts, this test should not be adopted and other test methods should be used instead. For which method to adopt, electroplating plants can consult the engineers of Bigely, a supplier of high-phosphorus chemical nickel solutions.
About us
Guangdong Bigely Technology Co., Ltd. ,founded in 2003, is a high-tech enterprise integrating R & D，production, sales and service, specializing in the production of electroplating additives. As a famous electroplating additives source manufacturer in China, Bigely has over 20 years' experience in electroplating additives production and own production base of 5000 square meters. We can produce 15,000 tons of electroplating additives every year, which can fully meet the needs of customers.
If you need our high-quality electroplating additives, please contact us. We can provide you samples for test, and also provide a series of services.
