Conversion coatings are coatings for metals where the part surface is converted into the coating with a chemical or electro-chemical process.
Examples include chromate conversion coatings. They are used for corrosion protection, increased surface hardness, to add decorative colour and as paint primers.
SPL Treatments offers the following types of Chemical Conversion:
Alocrom is a Chromate conversion coating chemically applied to aluminium and provides excellent corrosion protection. Alocrom 1200 is also applied before painting or powder coating and used when protection and/or electrical conductivity is required. Alocrom is ideal for coating all types of aluminium and aluminium alloys including high silicon pressure die-castings. It should be used on aluminium wherever maximum corrosion resistance is required and is suitable for articles that are to be painted or left unpainted.
It can also be applied as a touch-up treatment.
It can also be applied as a touch-up treatment, namely Brush Alocrom.
Alocrom 1000 (Alodine)
Alocrom 1000 produces protective coatings on aluminium and its alloys without significantly changing the appearance of the aluminium surface. It is recommended where a very low surface electrical resistance is required, or the aluminium is to be subsequently lacquered and so the surface must be uniformly metallic. Paint adhesion to this coating is excellent, and the electrical resistance is lower than either Alocrom 1200 coatings or untreated alloy.
Some key features include:
Best electrical conductivity of all Alocrom conversions
Minimal change in surface appearance: maintaining metallic appearance
Improved adhesion and corrosion resistance for painted surfaces
Gives excellent protection against corrosion to both painted and unpainted aluminium surfaces
SurTec RTU is a trivalent chrome conversion coating for aluminimum. Surtec RTU provides high level corrosion resistant finishes for many aluminium alloys and a base for paints, high performance topcoats and powder coatings.
Meets MIL-DTL-5541F specification
Provides bare corrosion protection comparable to hexavalent passivation
An alternative to Alocrom 1200 & 1000
Excellent adhesion to paints, sealants, and adhesives
Environmentally RoHS compliant–contains no hexavalent chromium compounds
Iridite NCP is designed to be a replacement for traditional chromate conversion coatings. Iridite NCP provides high level corrosion resistant finishes for many aluminium alloys and a base for paints, high performance topcoats and powder coatings.