Since there are two production processes for galvanized yoke plates, what are the differences in their performance characteristics and usage? Let's take a closer look: Hot-dip galvanizing: During the production process, the substrate undergoes pretreatment such as degreasing, pickling, rinsing, and fluxing to remove surface oil, rust, and scale. It is then immersed in molten zinc at 445℃-465℃, forming a zinc-iron alloy layer on the surface. This layer has strong adhesion and is not easily detached during use. After long-term use, the zinc layer also exhibits sacrificial anode protection, creating a self-healing protective effect. The service life of galvanized yokes can reach up to 15 years, offering excellent cost-effectiveness.
Electro-galvanizing: Through electrolysis, zinc ions are deposited on the substrate surface, forming a uniform and dense pure zinc protective layer. The zinc layer thickness is thinner than hot-dip galvanizing, typically around 10μm-30μm. Visually, the surface is smooth and even in color, with minimal impact on dimensional accuracy. If the corrosion resistance does not meet actual requirements, passivation treatment can be performed on the surface of the galvanized yoke plates to further improve corrosion resistance. It is suitable for applications requiring high precision and surface finish, with lower initial investment costs.
Hot-dip galvanizing and electro-galvanizing produce galvanized yoke plates differ not only in their manufacturing processes but also in their performance characteristics and application areas. Below, we will compare them in detail:
| type | Hot-dip galvanized yoke plates | Electro-galvanized yoke plates |
| Zinc layer thickness | 85μm-120μm, with a relatively thick protective layer; | 10μm-30μm, the protective layer is relatively thin; |
| Corrosion resistance | Extremely strong, withstanding salt spray tests for ≥500 hours, and outdoor rust protection life of 10-15 years; the zinc layer has "sacrificial anode" characteristics, and can still protect the substrate even with localized scratches; | Medium, withstanding ≥200 hours of salt spray test after passivation, and an outdoor rust-proof lifespan of 3-5 years; |
| Zinc coating adhesion | It typically has a strength of ≥10 N/mm², strong adhesion, and tight metallurgical bonding, allowing it to withstand bending and impact without falling off. | Under normal circumstances, it has a strength of ≥5N/mm², moderate adhesion, and is easy to peel off when subjected to external force. |
| Appearance | The surface is silvery-gray, uniform, and conforms to GB/T 13912-2022 standard, but has a low gloss level. | The surface is flat and smooth, without obvious flaws, and has a high degree of gloss. |
| Dimensional accuracy | The galvanizing process will slightly affect the accuracy, requiring subsequent straightening. The galvanized dimensional error should be ≤ ±0.1mm. | The impact on dimensional accuracy is very small, and no deformation occurs during the entire galvanizing process, with an error of ≤±0.05mm, making it suitable for high-precision requirements; |
| Substrate compatibility | Medium-thickness carbon steel can be selected, especially Q235B and 45# steel; | It is compatible with thin-walled, low-carbon steel substrates and can also be used for high-precision small parts; |
| Size range | Large sizes can be customized, with lengths ranging from 50mm to 3000mm, widths from 30mm to 1200mm, and thicknesses from 5mm to 80mm. | Mainly small and medium-sized, with lengths ranging from 20mm to 1500mm, widths from 15mm to 800mm, and thicknesses from 3mm to 50mm; |
| Mechanical properties | High temperatures may slightly affect the toughness of the substrate, but this can be recovered through subsequent slow cooling and straightening processes, and the compressive/shear strength will be consistent with the original substrate. | The room temperature process does not affect the mechanical properties of the substrate, and the compressive strength, shear strength and toughness are fully preserved, making it suitable for precision applications with stringent mechanical performance requirements. |
| Applicable Environment | Severely corrosive environments, such as marine engineering, port machinery, outdoor heavy equipment, and chemical workshops; | Mildly corrosive environments, such as indoor damp equipment, water pump brackets, electrical connections, and outdoor dry area facilities. |
Why should you purchase galvanized yoke plates from our company? Because our company has the following advantages in production:
Production capacity
Our company has a professional R&D team that can quickly respond to users' customized needs. Coupled with advanced production and testing equipment, we can meet the large-volume order needs of users worldwide and ensure fast delivery.
Pricing Strategy
Large-scale raw material procurement controls production costs, and while ensuring product quality, it provides users with competitive prices, especially for long-term cooperative users, which can help them reduce procurement costs.
Foreign trade experience
Our company has established long-term and stable working relationships with many countries, including the United States, Russia, and the United Kingdom. We are familiar with the import policies and market demands of these countries and provide users with integrated solutions encompassing customization, logistics, and after-sales service.
Galvanized yoke plates have a very wide range of applications, so users are very concerned about the quality of the product. How then do we judge its quality? We can evaluate it from several aspects, including appearance, zinc coating, precision, and performance.
Appearance
The surface should be smooth and uniform, without obvious defects such as unplated areas, exposed base, black spots, pits, or bubbles. Check the surface for scratches, bumps, or deformation, and ensure that the welds are flat and burr-free, and that the zinc layer is not peeling off.
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Zinc layer
Check if the thickness meets the standard and if there are any local uneven thicknesses. You can lightly scratch the surface with a hard object. If there is no peeling or flaking, pay attention to whether the corners are fully covered and whether the zinc layer is piled up and lumps.
02
accuracy
Use a measuring tape to measure the side length and wall thickness to ensure they meet national standards. Place the board on a flat surface and check if it is straight, without any obvious bending, twisting, or tilting.
03
performance
The main performance of galvanized yoke plates is their corrosion resistance. Therefore, we can test them using a 5% sodium chloride solution with a pH of 6.5-7.2 and a temperature of 35℃ to evaluate the zinc layer.
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