Zinc Coating

At SAP Parts, we pride ourselves on our cutting-edge in-house furnace technology, which allows us to maintain stringent quality control throughout the coating process. Here’s a detailed look at how we achieve exceptional zinc coatings:

Surface Preparation: We begin by meticulously cleaning and preparing the cast components. This involves removing any rust, oil, or contaminants through processes like sandblasting or acid cleaning. Proper surface preparation is essential for ensuring optimal adhesion of the zinc layer.

Pre-Coating Assessment: Each cast part undergoes a thorough inspection to evaluate its condition and determine the best coating strategy. This personalized approach ensures that we address specific vulnerabilities in each component.

Zinc Bath Application: Our in-house furnaces are equipped with hot-dip galvanizing capabilities. In this process, the cleaned cast parts are submerged in a molten zinc bath at temperatures typically around 450°C (842°F). This creates a metallurgical bond between the zinc and the base material, forming a robust protective layer.

Controlled Cooling: After the zinc coating is applied, the parts are carefully removed from the bath and allowed to cool in a controlled environment. This cooling process is crucial for ensuring the integrity of the coating and preventing cracking or flaking.

Post-Coating Treatment: For enhanced protection, we may apply additional treatments such as passivation or chromate conversion coatings. These treatments further improve corrosion resistance and help maintain the appearance of the coated parts.

Quality Control: Every coated part undergoes rigorous quality checks. We assess the thickness of the zinc layer, inspect for uniform coverage, and conduct adhesion tests to ensure that our coatings meet industry standards. Only parts that pass these inspections are approved for delivery.