METALAST Aluminum Anodizing Chemistry

Etches

METALAST® Etch 2000 - A high quality blended alkaline etch with grain refiners that quickly produces a matte finish, resulting in less aluminum removed than with other conventional etches. Water conditioning agents are added to this powder product to prevent scale formation in the tank. Chelators in this etch allow aluminum concentrations above 100 g/L. The etch is operated at 4 to 10 oz/gal at 120°F to 150°F for 2 to 10 minutes.

METALAST® Etch 2100 – An economical blended alkaline etch. Grain refiners and chelators provide a high level of performance at a reasonable cost. The etch is operated at 4 to 10 oz/gal at 120°F to 150°F for 2 to 10 minutes.

METALAST® Etch 2200(A) – An economical liquid etch additive with grain refiners and chelators intended to be combined with the customer’s sodium hydroxide to produce a good general purpose alkaline etch. The etch additive is used at 0.5 to 1 gallon per 100 lbs of dry caustic. The etch solution is operated at 120°F to 150°F for 2 to 10 minutes.

METALAST® Etch 2300(A) – Etch additive with grain refiners and chelators intended to be combined with the customer’s sodium hydroxide to produce a good general purpose alkaline etch. This liquid etch additive is used at 0.5 to 2 gallons per 100 lbs of dry caustic. The etch solution is operated at 120°F to 150°F for 2 to 10 minutes.

METALAST® Etch 2400(A) – A liquid etch additive with grain refiners and chelators intended to be combined with the customer’s sodium hydroxide to produce an alkaline etch that quickly yields a matte finish. Useful for high volume processing situations such as coil anodizing where throughput rates require a fast acting etch. The etch additive is used at 1 to 2 gallons per 100 lbs of dry caustic. The etch solution is operated at 120°F to 150°F for 2 to 10 minutes.

METALAST® Etch 2500(A) – Etch additive with grain refiners and chelators intended to be combined with the customer’s sodium hydroxide to produce a good general purpose alkaline etch. The liquid etch additive is used at 0.5 to 1 gallon per 100 lbs of dry caustic. The etch solution is operated at 120°F to 150°F for 2 to 10 minutes.