Giering Metal Finishing
Pre-Treatment Capabilities:
- Giering Metal Finishing can accommodate one to one million parts for liquid
- Automatic washers integrated into all automated systems
- Off line, multiple stage immersion cleaning & pretreatment lines
- Iron Phosphate TT-C-490 type II
- Zinc Phosphate TT-C-490 type I, TACOM/US Army Tank certified
- Chromate MIL-C-5541
- Rust & oxidation removal via acid pickle
- Sandblasting, glass bead, plastic bead
Phosphating processes can be separated into two types: iron phosphate and zinc phosphate.
Iron phosphates produce an amorphous coating on steel, galvanized and aluminum surfaces. Iron phosphates act to enhance the adhesion of paint and powder coat on multi-metal parts. Iron phosphating has been the process of choice for applications where overall cost considerations override all maximum performance needs. Since iron phosphates are thinner coatings than zinc phosphates and only contain the metal ion of the substrate being processed, they provide reduced corrosion resistance compared with a zinc phosphate. However, with environmental restrictions becoming increasingly tight with respect to heavy metals, an iron phosphate coating coupled with thorough post treatment may offer a viable alternative while still meeting required corrosion-resistance specifications.
Zinc phosphates provide maximum corrosion protection and extended service life. Zinc phosphate (Zn3(PO4)2) is an inorganic chemical compound used as a corrosion resistant coating on metal surfaces either as part of an electroplating process or applied as a primer.
The federal specification for paint-based phosphate coatings, TTC490, states that phosphate coatings can be applied to substrates other than zinc-plated and steel parts too. Zinc phosphates have become the preferred prepaint treatment in the products finishing industry, especially with the use of electrocoat paint systems. The reason is that they provide better corrosion resistance and paint adhesion than iron phosphates, even under more demanding conditions.
Paint-based phosphate formulations can also be applied to galvanized steel, cadmium plating and aluminum. Phosphate solutions include nitrate, chlorate and iron accelerated types, nickel- fluorides, calcium-modified, and manganese-modified (trimetal or polycrystalline) formulations applied by spray or immersion processes.
Aluminum Conversion Coatings/Chromate/Chem Film
SafeGard CC-3400 - Is a conversion coating that is extremely effective on aluminum, magnesium and zinc. On Aluminum you can get both the clear and gold color from the same tank. On aluminum, Safegard CC-3400 provides excellent unpainted corrosion resistance and creates excellent base for paints and powder coatings.
Best overall adhesion and corrosion resistance combination. In extensive testing performed at the Naval Air Development Center, SafeGard CC met the requirements for paint adhesion and even outperformed chromate. It has also been used as a replacement for light anodizing
A major European telecommunications company is now using SafeGard CC on to meet Europes ROHS Directive for the elimination of hexavalent chromium in Electrical and Electronic Equipment effective July 2006. California has already passed legislation to fall approximately in line with the EU timescales. They are using SafeGard CC-3400 with SafeGard CC-3400seal#2 for their corrosion and electrical conductivity on their aluminum parts.
SafeGard CC has been tested by Boeing in St Louis. MO. They also agree that it passes both the corrosion and electrical conductivity requirements for Mil-C-5541E.
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