By Gordon Fettis
This accomplished resource of data on man made natural pigments treats all features of purposes of natural pigments from chemical and actual viewpoints. correct try tools are coated and toxicological and ecological homes are defined. It considers the synthesis, houses and purposes of natural pigments commercially and standardized equipment permit try effects to be in comparison in the course of the ebook.
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Extra info for Automotive Paints and Coatings
24 2 Surface Pretreatment o fAluminium for Automotive Applications Accordingly, heavy chromate coatings are prefered as a pretreatment coating for aluminium wheels to provide a high grade of rust-prevention. However, the demand for colourless type coatings as mentioned above has favoured the use of a colourless chromating with a coating weight of less than 15mg/m2. Wheels are pretreated by spraying so as to minimize the difference of a coating weight between the upper and lower part of a hanger.
2) New equipment is needed Steel body Assy for Cr. 3) Be aware of dissolution of chromium coating. Aluminium components Aluminium components ED i-;:? 1) Phosphatability is good and E D application is feasible. _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ Very 2) New equipment is needed High for Cr. & ED. Steel body Assy 3) Big process change is needed in Assy. ~ Aluminium c o m p o n e n t s j T H Y v Phos ED , __________________ ___________ Steel body 1) Phosphatability is good and E D application is feasible.
Until the mid-1970s all electroprimers used by the automotive industry were of the anodic type because the resin technology was readily available and adequate for the needs of the industry of that period. Such chemistry included maleinised oils, polyesters, epoxy ester, or polybutadiene polymers, combined with specific anticorrosive pigments. G company the cathodic version of electropriming. g. box sections, edges, joints, crevices, cavities). Superior throwing power (penetration) performance to critical areas as mentioned above.