Difference between Pre Painted Galvanized Steel Coil and Pre Painted Galvanized Steel Coil
The difference between the same Pre Painted Galvanized Steel Coil is the quality and service life, and the key depends on the needs of customers. The seemingly same PPGI Steel Coil will have different qualities and service lives. The Color-coated Steel Coils that meet customer needs will be the best Color-coated Steel Coils. Our service is to provide customers with Pre Painted Galvanized Steel Coil with corresponding needs.
What are the differences between Pre Painted Galvanized Steel Coil with the same requirements? It lies in the quality of the substrate, the weight of the zinc coating, the brand and quality of the paint, and the most important point is whether the salesperson serving you can understand your real needs and meet your needs.
For customers
How do you judge whether the steel coils you receive meet the standards, exceed the standards, or fall below the standards?
Visual inspection
Is the steel surface flat? If the steel surface is not flat enough, such as bulges, steel grains, and particles, the corresponding problem is that the substrate is not good enough, and the cleaning may not be thorough enough during the production process (this will affect the adhesion of the paint).
01
Take samples to the local laboratory for testing.
The focus of the test is the thickness of the zinc layer, the thickness of the paint film, the bending condition, and the paint adhesion.
02
Make roofing sheet
The most direct way to test is to press it in to roofing sheet. If there is a problem with the most basic pressing roofing sheet, the quality of the goods must be below the standard.
03
Customer's own experience
Customers have their own experience, testing and judgment. Customers have a certain understanding of the product and their own judgment criteria. Whether it meets the requirements is very important for customers to measure.
04
The sincerity of the salesperson
Whether a salesperson treats customers sincerely and whether he can provide customers with satisfactory products according to customer requirements is very important. In this regard, customers are the most experienced and generally feel that they are not wrong.
05
Test for PPGI/PPGL steel coil
The following are the various tests we perform during production. Please see the detailed introduction below
(Only the test of color-coated coils is introduced here. For detailed test of substrates, please see Galvanized Steel Coil and Aluzinc Steel Coil)
Thickness for paint coating
Paint thickness is a very important point, which is one of the factors that determine the service life of the product. Usually we use a Paint film instrument to measure it, which is the most commonly used detection method on the market. The Paint film instrument can basically accurately measure the thickness of the paint film.
Paint Brand
This is also one of the factors that determine the service life of the product. Most customers do not have too many requirements on the brand, because the brand represents quality as well as price. For customers, products with cost-effectiveness and that meet local market demand will be the most suitable products. Of course, some customers also have requirements for brands. For example, customers want Nippon, Aksu, and Winter (these are relatively large brands), and some specify other small brands.
T Bending Test
This test is to detect the flexibility of the paint. By bending, observe the cracking or shedding of the coating on the bent surface. Bending 180 degrees is 0T, and continuing to bend 180 degrees is 1T, and so on, 2T, 3T. Under normal circumstances, 2T-3T is the most perfect state. 0T paint does not fall off, which means that the paint is very soft, which is very good for make corrugated roofing sheets and will not fall off. However, if the paint is too soft, it will reduce the service life of the tiles when used on roofs or walls. 4T-5T does not fall off, which means that the paint is too hard, which is more friendly to the service life of the product during use, but it will not pass when produce Galvalume Roofing Sheet and the paint will fall off. The key point depends on the customer's use and what type of roof to produce. Different tile types have different requirements for T-bends.
Wipe Test
This is a basic test. Normally, if the paint does not fall off after wiping it 100 times with cotton soaked in butanone, it meets the standard. If the paint falls off, it is most likely that the baking temperature is not enough and the paint is too wet.
Pencil Hardness test
Use pencils of different hardness (H 2H 3H) to scratch the steel plate at a 45-degree angle. If there is no cracking or scratching on the paint film, it meets the standard.
Gloss test
Detection with gloss instrument
Color-coated Steel Coils
The Color-coated Steel Coils we can do
Wood coated steel coil
Wrinkle coated steel coil
PPGL/PPGI steel coil with film
Other pattern PPGI steel coil
About transportation
Bulk Ships and containers are available, depending on customer needs. In the past two years, container shipping costs have risen sharply, and many customers choose bulk carriers instead of containers. However, some customers still choose containers for quickly delivery time and safety.
For large orders with large quantities, some customers will choose bulk carriers.
So choose the most suitable transportation method according to your own needs, and we will cooperate with you.
FAQ
Q: Can you provide samples?
A: We can provide free samples. For new customers, you need to pay the courier fee. We will deduct this charge from the deposit of the first order.
Q: Can you produce according to our samples?
A: Absolutely. You can send your samples and we will make samples for your reference. You can check the samples and then consider if you need to place the order
Q: How long can you delivery?
A: The delivery time of different products is different. The delivery time of conventional products is 10-20 days. The delivery time of special products is 20-40 days.
Q: Can I visit the factory by video?
A: Absolutely. We can introduce our factory to you by video at a time that suits you.
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