The differences in corrosion resistance among PE film slitting blades of different brands mainly focus on three key aspects: material selection, surface treatment technology, and quality control standards. These differences directly affect the service life of the blades, applicable scenarios, and comprehensive procurement costs, which align with the core needs of procurement and selection. The specific differences are as follows:
1.Differences in material selection (the core aspect)
High-end brands: Priority is given to the use of high-chromium stainless steel, tungsten-molybdenum alloy reinforced materials, or ceramic materials. Some high-end models use cemented carbides such as YG10x and YG12x. These materials have a high chromium content or excellent chemical stability, can form a dense passive oxide film, and have strong resistance to corrosion from moisture, chemical auxiliaries, and salt in coastal areas. After being immersed in chemical slurries, they can still maintain intact cutting edges and stable hardness, making them suitable for high-demand PE film production scenarios
Mid-range brands: Mostly use ordinary stainless steel (with medium chromium content) or coated high-carbon steel. They can meet the production requirements of PE films under regular humidity conditions without significant chemical corrosion. Their corrosion resistance meets the standards but lacks the ability to adapt to complex scenarios. When used for a long time in high-humidity environments or environments with chemical additives, the cutting edges are prone to dulling and slight rusting.
Low-end brands: Mostly use ordinary carbon steel or low-grade stainless steel, without adding sufficient anti-corrosion alloying elements and lacking effective anti-corrosion mechanisms. They are prone to rusting when affected by moisture and mild chemicals, have a short service life, and are only suitable for temporary emergency use or low-requirement cutting scenarios. Long-term use can easily lead to burrs on the PE film cut edges and an increase in the scrap rate.
2.Differences in surface treatment processes
High-end brands: Adopt ceramic-based, polymer-based coatings or DLC (diamond-like carbon) coatings, some paired with mirror precision grinding technology. The coatings are uniform, firm, and have strong adhesion, which can effectively isolate corrosive environments, reduce cutting friction, further improve corrosion resistance and service life. Some products can achieve no corrosion on the cutting edge after being immersed in electronic silver paste and carbon paste for 96 hours.
Mid-end brands: Mostly use basic coating treatment. The coating thickness is uneven and the adhesion is average. They can improve corrosion resistance in the short term, but they are prone to falling off after long-term use, losing the anti-corrosion effect. The corrosion resistance decays quickly, and blades need to be replaced frequently to ensure cutting quality.
Low-end brands: Basically have no surface anti-corrosion treatment, or only simple anti-rust treatment, with no effective anti-corrosion barrier. They are prone to rapid rusting, the cutting performance declines quickly, and the replacement frequency is high, which significantly increases procurement and labor costs.
3.Differences in quality control and customization
High-end brands: They have strict raw material selection and production quality control processes. Coatings and materials undergo rigorous testing, with strong batch stability. They can also provide customized material and coating solutions based on the customer's specific operating environment (such as high humidity, coastal areas, and environments containing chemical additives) to accurately meet anti-corrosion needs. Some brands can even offer equipment adaptation and debugging services.
Mid-range brands: Their quality control standards are average, with significant differences in corrosion resistance between batches. Some can provide basic specification adaptations, but they struggle to meet customized anti-corrosion needs in complex scenarios and can only be adapted to conventional PE film production environments.
Low-end brands: They have no standardized quality control processes, with uneven materials and craftsmanship. Their corrosion resistance is not guaranteed, and they have no customization capabilities. They can only meet simple cutting needs and are prone to production interruptions and product scrapping due to corrosion.
