Phosphoric Anodising (PAA)
Our PAA facility is being upgraded continuously to improve turnaround and capacity to assist demands from the aircraft executive seating, aircraft interiors, automotive and general aerospace and defence markets.

Phosphoric acid anodising, or PAA, was developed by the Boeing Company, as a structural bonding surface and is used for structural adhesive bonding in high-humidity environments. This process is known as the “Boeing Process.”

The formed oxide film has a greater durability under adverse conditions than film formed in chromic acid and sulphuric acid anodising.

One of the reasons for the great adhesive property is said to be due to the morphology of the oxide film, which consists of pores with whiskers or protrusions on the top surface of the formed film.

Our processes conform to the following specifications:

• D3933-98
• Zodiac Aerospace Standard EPS 2035
• Zodiac Aerospace Standard EPS 2025-2

Structural Bonding Primers and corrosion inhibiting Primers(Choice of):

• 3M EC3960
• 3M EW-5000-AS
• EW-5000-AS
• Redux 112
• Cytec BR252
• Cytec BR127
• Cytec BR 6747