The Main Stages of Phosphating Process

• Cleaning, done mechanically in an alkaline solution
• Hot water rinsing
• Pickling (acid cleaning) with acid activation (if necessary)
• Water rinsing
• Phosphating by immersion or spraying method, for a range 2 - 40 minutes
• Water rinsing
• Drying

Characteristics of phosphating include:

• Pale to dark grey manganese, zinc or zinc/calcium phosphate layer consisting of secondary and tertiary manganese, zinc or zinc/calcium phosphates.
• Securely anchored on the base metal
• Fine-crystalline to coarse-crystalline appearance (according to process)
• The additional layer (3–20 micrometers) – must be taken into account for fitting parts.
• Thanks to the existence of many capillaries in the layer, corrosion protection oils and lacquers are very well absorbed, providing very good corrosion protection.
• Phosphate layers are electrically non-conductive, i.e. their insulating resistance is relatively high.
• Damaged layers are hardly penetrated by rust.

Mayuri Phosphating Chemicals

Key Features

• Single Component; 3 in 1 Phosphating Chemical
• Extends life of metals, and paint quality
• Prevents metal corrosion and removes corrosion products
• Economical & environmental friendly
• Well effective at room temperature