The invention discloses a blackening technology for a
copper product. The technology includes the following steps that 1,
degreasing and decontaminating are performed, and specifically, stains on thesurface of the product are removed; 2, overflowing and rinsing are performed, and specifically, the stains on the surface of the product are washed; 3,
pickling and activating are performed, and specifically, oxides on the surface of the product are removed; 4, overflowing and rinsing are performed, and specifically, the stains are washed; 5, blackening for the first time is performed, and specifically, a light-color blackening layer is formed; 6, overflow and rinsing are performed; 7, blackening for the second time is performed, and specifically, a stable blackening layer is formed; 8, overflow and rinsing are performed; 9, sealing is performed, and specifically, an anti-oxidation film is formed outside the blackening layer of the finished product; 10, overflow and rinsing are performed;11,
drying is performed; 12, vibration and
grinding are performed to remove dust, and specifically, accumulated dust and impurities on the surface of the product are removed. According to the blackening technology of the
copper product, the requirements that the blackening layer of the product does not leak
copper in a long-time
salt spray test and does not fade for a long time in high-temperature, high-
humidity, thermal-shock and low-temperature cold-shock continuous tests can be met, and the product has the good
light reflection resistance and
refraction resistance.