The titanium gold plating process on aluminum profiles belongs to the coating technology. It adds pre plating and electroplating process steps to the conventional titanium plating process. The aluminum profile process involves chemically treating the activated plated parts in an aqueous solution of salt and hydrochloric acid; The plating solution components of the electroplating process include nickel sulfate, nickel chloride, boric acid, sodium dodecyl sulfate, saccharin, and brightener. This process has the advantages of simplicity, practicality, and good results. The film hardness of the titanium aluminum profile produced by this process is HV ≈ 1500, and under the same conditions, it is 150 times more wear-resistant than 22 K gold plating. It can be processed into various forms of gold, color, black, and other bright series of aluminum profile products.
Extrusion defects. During the extrusion process of aluminum profiles, defects such as bubbles, inclusions, layering, color difference, and distortion may occur due to the completeness of the extrusion equipment, maturity of the extrusion process, and improper operation, which affects the quality of aluminum profiles.
The thickness of the oxide film is thin. The national standard stipulates that the thickness of the oxide film on building aluminum profiles should not be less than 10um (micrometers). Insufficient thickness makes the surface of aluminum profiles prone to rusting and corrosion. Some aluminum profiles without production name, factory address, production license, or qualification certificate during the sampling inspection have an oxide film thickness of only 2 to 4um, and some even do not have an oxide film. According to expert estimates, for every 1um reduction in oxide film thickness, each ton of profiles can reduce power consumption costs by over 150 yuan.
The chemical composition is not qualified. The addition of a large amount of miscellaneous aluminum and waste aluminum can greatly reduce costs, but it can lead to unqualified chemical composition of building aluminum profiles, seriously endangering the safety of construction projects.
Reduce the wall thickness of the profile. The 90 series sliding window type, according to national standards, has an aluminum profile with a wall thickness Z of no less than 1.4mm, and some products only have a thickness of 0.6 to 0.7mm. The 46 series floor spring door type uses aluminum profiles with a wall thickness Z of no less than 1.62mm according to national standards. During sampling, some products are only 0.97 to 1.18mm.
Poor quality aluminum profiles greatly reduce sealing time, reduce chemical reagent loss, and lower costs, but the corrosion resistance of the profiles is also greatly reduced