1-20 of 94 Search Results for

chromic acid rinsing

Follow your search
Access your saved searches in your account

Would you like to receive an alert when new items match your search?
Close Modal
Sort by
Book Chapter

Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001274
EISBN: 978-1-62708-170-2
..., rinsing after phosphating, and chromic acid rinsing. The article describes the techniques for controlling the chemical composition of various phosphating solutions. It discusses the equipment and factors that influence equipment requirements in immersion and spray systems. The article also describes...
Image
Published: 01 January 1994
Water 35 95 15 8 Acidulated rinse Partially reduced chromic acid (150 to 200 ppm Cr 6+ ) 35 95 35 9 Rinse Deionized water (100 μmho max) 35 95 70 10 Rinse Deionized water (10 μmho) 35 95 15 11 Dryer Hot air … … … (a) Total acid 20 mL (5.3 × 10 −3 gal), free More
Image
Published: 01 January 1994
/L (5.8 × 10 −3 lb/gal) 71 160 1 2 5 Hot rinse Water 66 150 1 2 6 Zinc phosphate NO 2 , accelerated (c) 60 140 1 1 2 7 Hot rinse Water (a) 60 140 1 2 8 Acid rinse Chromic and phosphoric acids (d) 71 160 1 2 More
Series: ASM Handbook
Volume: 2A
Publisher: ASM International
Published: 30 November 2018
DOI: 10.31399/asm.hb.v02a.a0006489
EISBN: 978-1-62708-207-5
... etching and acid etching of aluminum. Alkaline etching reduces or eliminates surface scratches, nicks, extrusion die lines, and other imperfections. Acid etching can be done without heavy smut problems, particularly on aluminum die castings. Hydrochloric, hydrofluoric, nitric, phosphoric, chromic...
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001227
EISBN: 978-1-62708-170-2
... acid solutions and mixtures containing chromic acid are often used as final rinses in acid cleaning-phosphating systems. The acid enhances the corrosion resistance of the coated surface. Paint applied following such a treatment gives greater protection against corrosion by salt and humid environments...
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001243
EISBN: 978-1-62708-170-2
... Abstract Hard chromium plating is produced by electrodeposition from a solution containing chromic acid and a catalytic anion in proper proportion. This article presents the major uses of hard chromium plating, and focuses on the selection factors, plating solutions, solution and process...
Series: ASM Handbook
Volume: 2A
Publisher: ASM International
Published: 30 November 2018
DOI: 10.31399/asm.hb.v02a.a0006511
EISBN: 978-1-62708-207-5
... rinse operations and may be different in composition from those described in the table. Changes in the balanced bath could result in reduced performance. Brighteners and other additives are used in some phosphoric-nitric acid baths. As additive content increases, solution control becomes more...
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001281
EISBN: 978-1-62708-170-2
... Abstract Anodizing refers to conversion coating of the surface of aluminum and its alloys to porous aluminum oxide. This article provides the reasons for performing anodizing and discusses the three principal types of anodizing processes, namely, chromic acid process, sulfuric acid process...
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001310
EISBN: 978-1-62708-170-2
... pickling treatments for magnesium alloys Treatment Principal applications Metal removed Solution Constituents Amount Operating temperature Immersion time, min Tank material or lining μm mils g/L oz/gal °C °F For cast or wrought alloys Chromic acid Remove oxide, flux...
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001244
EISBN: 978-1-62708-170-2
... plating tank with solution from save-rinse and boil-down tanks. Stir solution thoroughly, using low-pressure air agitation. Check solution for chromic acid, sulfate, and anti-spray additives; make corrective additions. Check temperature controls for satisfactory operation; adjust temperature...
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001308
EISBN: 978-1-62708-170-2
... s of the cleaning operation. After removal from the cleaner, the work is rinsed in warm or hot water, dipped in acid to neutralize any residual alkali, and finally rinsed in cold water. The work can then be finished as desired. The composition of two solutions that are recommended...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003221
EISBN: 978-1-62708-199-3
... for chromic acid anodizing Table 5 Sequence of operations for chromic acid anodizing Operation Solution Solution temperature Treatment time, min °C °F Vapor degrease Suitable solvent … … … Alkaline clean Alkaline cleaner (a) (a) (a) Rinse (b) Water Ambient Ambient...
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001307
EISBN: 978-1-62708-170-2
... be conducted to detect embrittlement. For example, lead can be detected by the yellow precipitate that forms when a test solution of chromic acid (10 wt%), sodium chlorate (1.5 wt%), and water (88.5 wt%) is applied to the suspected surface at temperatures ranging from 21 to 60 °C (70 to 140 °F). Mechanical...
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001221
EISBN: 978-1-62708-170-2
... or titanium to avoid hydrogen embrittlement. Rinse in cold water containing chromic acid for rust prevention. Rinse in cold water containing ammonia. Rinse in hot water containing 0.1% sodium nitrate. Dry in hot air. Place parts in solvent emulsion prior to manganese phosphate coating...
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001315
EISBN: 978-1-62708-170-2
... Soak alkaline cleaning and/or alkaline electrocleaning followed by rinsing Acid dipping followed by rinsing Guidelines for preparing zinc die castings for electroplating are contained in ASTM B 252 ( Ref 5 ). If die cast parts are to be painted, they are often given a chromate or phosphate...
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001313
EISBN: 978-1-62708-170-2
...%) Sulfuric acid (concentrated) 15 Hydrochloric acid (concentrated) 15 Aqueous solution of chromic acid (6-10 wt% CrO 3 ) 70 Immerse the molybdenum in bath No. 1 for 5 to 10 min at 65 to 80 °C (150 to 180 °F), remove, and spray rinse. This will leave a black smut on the surface. Rinse...
Series: ASM Handbook
Volume: 2A
Publisher: ASM International
Published: 30 November 2018
DOI: 10.31399/asm.hb.v02a.a0006521
EISBN: 978-1-62708-207-5
... are heavier and tolerate more impurities, and, therefore, the requirements for rinses prior to the treatment bath are more limited. Pretreatment immediately prior to the coating operation is required to develop extremely uniform conversion coatings. Either acid or alkaline solutions are used. Subsequent...
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001247
EISBN: 978-1-62708-170-2
... following hydrochloric acid pickling, may be done in unlined steel tanks. The use of unlined steel tanks for rinsing following pickling or acid plating is not recommended. Racking Racking of parts for cadmium plating is subject to the same considerations as in the electrodeposition of other metals...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003247
EISBN: 978-1-62708-199-3
...) for uniform wettability. After precleaning, rinse in cold water and immediately immerse in etchant for 30 s. 11 2 g NaOH, 5 g NaF, 93 mL water Immerse for 2 to 3 min. 12 50 mL Poulton's reagent (etchant 4 in Table 1 ), 25 mL HNO 3 (conc), 40 mL of solution of 3 g chromic acid per 10 mL of water...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003217
EISBN: 978-1-62708-199-3
... intensifies the coloring, manganese phosphate coatings are usually black in appearance. Process Details The application of a phosphate coating as a base for subsequent painting normally comprises five successive operations: (a) cleaning, (b) rinsing, (c) phosphating, (d) rinsing, and (e) chromic acid...