SMM A00 Aluminum Ingot(CNY/mt)
On June 23th, the price of SMM A00 aluminum dropped by CNY 50/Mt compared with the previous trading day.The internal divisions in the United States and the risk of war in the Middle East are increasing. Be wary of the impact of short-term geopolitical events on the market. The demand for aluminum market has gradually weakened, and the weekly operating rate of aluminum industry has continued to decline month-on-month. In addition, the aluminum price fluctuated at a high level, and the terminal demand of the industry was weak.Aluminum prices surged last week, with LME performing better than A00 aluminum. A00 aluminum rose 0.12% (as of Friday's close), while LME closed up 2.34% at $2,561/ton. China's aluminum ingot inventory continued to decline, with inventory recorded at 449,000 tons, down 11,000 tons from the previous week, and bonded area inventory down 5,000 tons from the previous week to 114,000 tons. LME aluminum inventory is also at a low level, with aluminum inventory in the LME market down 10,000 tons from the previous week to 343,000 tons. With tight spot supply and marginal improvement in risk sentiment, aluminum prices may continue to surge, but the price increase is limited by demand. This week's aluminum price is expected to fluctuate between CNY 20,500/Mt CNY 20,700/Mt.
CNY 20,800
Average Price of the Last 3 Days
CNY 20,726
Average Price of the Last 5 Days
CNY 20,660
Average Price of the Last 5 Days
What are the factors that affect the adhesion of color coated aluminum coils?
The adhesion between the paint film and the substrate of the color coated aluminum coil is produced by mechanical bonding, physical adsorption, hydrogen bonding, chemical bonding, mutual diffusion, etc. At the same time, the adhesion of the colored aluminum coil is also affected by the type and quality of the aluminum substrate, the type and performance of the coating and the coating process.
Aluminum Substrate
Aluminum Alloy Series: The adhesion of aluminum alloys in different series is also different. For example, the adhesion of 1100 aluminum alloy is lower than that of 3000 aluminum alloy.
Aluminum Alloy Temper: The hardness of aluminum alloys in different tempers will affect the activity of paint and affect the adhesion of colored aluminum coil coating.
Degreasing and Cleaning: If the aluminum surface retains oil stains, oxides, or dust, it will significantly reduce the coating adhesion.
Passivation Effect: The uneven passivation treatment can result in localized poor adhesion of the coating on color coated aluminum coils.
Paint performance
Coating Type: Different types of paintings (such as PE, PVDF, SMP) have different adhesion strengths. PVDF > SMP > PE in terms of adhesion.
Coating Flexibility : The flexibility of colored aluminum coil coating should be chosen according to the post-processing method (slitting, bending, roll forming). The coating is too hard may crack during processing, reducing adhesion and the coating of color coated aluminum coil that is too soft may peel off. PE coatings have better flexibility than PVDF coatings.
Coating process parameters
Curing Temperature: The curing temperature and time should be set based on the coating type and thickness. If the curing temperature is too low, the coating adhesion of painted aluminum coil will be poor; if too high, the coating may be brittle and flake off.
Coating Thickness Control: Excessively thick or thin coatings of painted aluminum coil may lead to reduced adhesion.
Roll Coating Pressure and Speed: Inconsistent pressure or speed of coated aluminum coil can affect the uniform distribution of the paint on the substrate, impacting adhesion quality.
Welcome to Inquire
We have sufficient aluminum substrate inventory to meet your short delivery needs