Basic zinc chromate

The simplest method of chromate sealing involves immersion in a dilute alkali chromate or dichromate solution followed by washing retained chromate imparts a yellow colour to the film. More substantial amounts of slightly soluble chromate can be deposited in the thicker type of absorbent anodic film by a method developed by Dr. L. Whitby at High Duty Alloys Ltd. In this, anodised parts are immersed first in a boiling 30% solution of sodium chromate and then in a boiling 2% solution of zinc nitrate. Residues of the first solution in the film react with the second solution to give a substantial yellow deposit of a basic zinc chromate, probably similar in composition to zinc yellow. [Pg.729]

Zinc tetraoxychromate ZnCr04 4 Zn(OH)2 [15930-94-6] basic zinc chromate ZTO chromate zinc tetrahydroxychromate C.I. Pigment Yellow 36 yellow powder ca. 0.04... [Pg.200]

Basic zinc potassium chromate 4 ZnO K20 4 Cr03 3 H20 [37300-23-5] basic zinc chromate zinc chromate pigment lemon yellow C.I. Pigment Yellow 36 lemon yellow triclinic flakes 2.5-5... [Pg.200]

References may be found in the literature to attempts made for the purpose of reacting ethylene in a variety of other ways to obtain useful products. Condensation and oxidation products are claimed to lie formed when ethylene mixed with steam, ammonia, or hydrogen sulfide is passed over catalysts at high temperatures.811 Unsuccessful attempts have been made to obtain acetone by reacting ethylene with hydrogen and carbon monoxide in a molal ratio of 1 2.5 1, respectively, at 300° C. and 150 to 250 atmospheres pressure in the presence of a basic zinc chromate catalyst. In this case methanol was formed, a portion of the ethylene polymerized, and a portion was reduced to ethane.888 No acetone was formed. [Pg.230]

Basic zinc chromate Buttercup Yellow C.l. 77955 CCRIS 7569 Chromic acid (H2Cr04). zinc salt (1 1) Chromic acid, zinc salt Chromic acid, zinc salt (1 1) Chromium zinc oxide (ZrCrCH) Cl 77955 EINECS 236-878-9 HSDB 6188 Pigment Yellow 36 Zinc chromate Zinc chromate AM Zinc chromate C Zinc chromate 0 Zinc chromate T Zinc chromate Z Zinc chromate(VI) hydroxide Zinc chrome Zinc chrome (anS-corrosion) Zinc Chrome Yellow ... [Pg.677]

Zinc chromates (basic zinc chromate, ZnCt04 zinc potassium chromate, KZPj (Cr04)2(0H) zincyettow) Contains hexavalent chromium which Is associated with luhg cancer in workers. See also p 167. 0.01 mg/m (asCr),A1 Basic zinc chromate is a yeiiow pigment dichromates are orange. [Pg.628]

Baryta white. See Barium sulfate Baryta yellow. See Barium chromate Barytes. See Barium sulfate Basic bismuth chloride. See Bismuth oxychloride Basic copper sulfate. See Cupric sulfate anhydrous Basic lead silica chromate. See Lead silicochromate Basic lead white silicate. See Lead silicate Basic zinc chromate. See Zinc chromate Battery acid. See Sulfuric acid... [Pg.985]

Synonyms Basic zinc chromate Buttercup yellow Chromic acid, zinc salt Chromium zinc oxide Cl 77955 Citron yellow Pigment yellow 36 Pure zinc chrome Pure zinc yellow Zinc chromate (VI) hydroxide Zinc chrome Zinc chrome yellow Zinc chromium oxide Zinc... [Pg.1422]

Basic zinc chromate. See Zinc chromate Basic zinc potassium chromate. See Zinc potassium chromate... [Pg.401]

Synonyms Basic zinc chromate Buttercup yellow Chromic acid, zinc salt Chromium zinc oxide Cl 77955... [Pg.4745]

Basic zinc chromate n. ZnCr04-4Zn(OH)2. Yellow pigment used primarily for its corrosion-inhibiting properties. Syn zinc tetroxy chromate. [Pg.93]

Paint 27 Basic Zinc Chromate-Vinyl Butyral Wash Primer... [Pg.863]

Zinc tetroxychromate, or basic zinc chromate, is commonly used in the manufacture of two-package polyvinyl butyryl (PVB) wash primers. These consist of phosphoric acid and zinc tetroxychromate dispersed in a solution of PVB in alcohol. These etch primers, as they are known, are used to passivate steel, galvanized steel, and aluminium surfaces, improving the adhesion of subsequent coatings. They tend to be low in solids and are applied at fairly low film thicknesses [23]. [Pg.41]

Leighton et al. (1987) Leighton, I Reeve, A. Roy, A. White, R. Vincent van Gogh s A Cornfield, with Cypressess National Gallery Technical Bulletin 11 (1987) 42-59 Leisy (1941) Leisy, R.W. A process for the manufacture of basic zinc chromate United States Patent 2,251,846. British Patent 547,859 (1941)... [Pg.479]

Basic zinc chromate possesses properties somewhat similar to those of zinc yellow. This pigment is used in metal pretreatments, especially in the well-known wash primer government specification for conditioning metals, where it promotes adhesion and corrosion resistance in steel and aluminum. [Pg.92]

Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...