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trivalent plating

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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
... rinsing after chromium plating, which failed to remove small amounts of bath impurities, resulted in nonuniform appearance of the plate on zinc die castings. The parts were given a hot rinse at 93 °C (200 °F) before customary room-temperature rinses to remove bath impurities. Trivalent...
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001259
EISBN: 978-1-62708-170-2
... Plating Using Hexavalent and Trivalent Chromium Ion Solutions,” U.S. Patent Application , May 1986 19. Hoshino S. et al. , The Electrodeposition and Properties of Amorphous Chromium Film Prepared from Chromium Acid Solutions , J. Electrochem. Soc. , Vol 133 ( No. 4 ), 1986 , p 681...
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001275
EISBN: 978-1-62708-170-2
..., cadmium, magnesium, and aluminum, can be chromate conversion coated. Several articles in this Volume contain details about the procedures used to apply chromate coatings to specific metals and metal coatings. The conversion coating of cadmium electrodeposits is discussed in the article “Cadmium Plating...
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
... be formed by the decomposition of organics, but more often it results from too low a ratio of anode-to-cathode area, a condition always encountered in plating interior surfaces cylinders. Trivalent chromium can be reoxidized to hexavalent chromium by electrolyzing the solution at 60 to 66 °C (140 to 150 °F...
Series: ASM Handbook
Volume: 2A
Publisher: ASM International
Published: 30 November 2018
DOI: 10.31399/asm.hb.v02a.a0006492
EISBN: 978-1-62708-207-5
... Galvanic table for many common alloys Active (anodic) 1. Magnesium 2. Mg alloy AZ-31B 3. Mg alloy HK-31A 4. Zinc (hot dip, die cast, or plated) 5. Beryllium (hot pressed) 6. Al 7072 clad on 7075 7. Al 2014-T3 8. Al 1160-H14 9. Al 7079-T6 10. Cadmium (plated) 11...
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
... Acknowledgments References References 1. Baudrand D. , Conversion coatings for aluminum and magnesium , Plating and Surface Finishing , 92 ( 1 ), 2005 , p 30 – 34 2. Bibber J. , An update on chrome-free pretreatments for aluminum , Metal Finishing , Vol 96 , No. 4 , April...
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001268
EISBN: 978-1-62708-170-2
... to the trivalent state before standard precipitation can proceed. Sodium metabisulfite or ferrous sulfate added at a pH of about 2 will reduce the hexavalent chromium and allow the resultant trivalent chromium to be combined with other wastes for regular precipitation. Most mechanical plating systems capable...
Series: ASM Handbook
Volume: 13C
Publisher: ASM International
Published: 01 January 2006
DOI: 10.31399/asm.hb.v13c.a0004205
EISBN: 978-1-62708-184-9
... – 276 10.1016/0014-4827(88)90191-7 11. Hierholzer S. , Heirholzer G. , Sauer K.H. , and Paterson R.S. , Increased Corrosion of Stainless Steel Implants in Infected Plated Fractures , Arch. Orthop. Trauma. Surg. , Vol 102 , 1984 , p 198 – 200 12. Rae T...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003215
EISBN: 978-1-62708-199-3
... Chromium plating tanks can be heated internally or externally. Internal heating, by steam coils or electric immersion heaters, is usually used for small tanks; external heating, by heat exchangers, is used for large tanks. Trivalent Chromium Plating Solution Compositions Depending on the process...
Series: ASM Handbook
Volume: 23
Publisher: ASM International
Published: 01 June 2012
DOI: 10.31399/asm.hb.v23.a0005652
EISBN: 978-1-62708-198-6
.... Hierholzer S. , Heirholzer G. , Sauer K.H. , and Paterson R.S. , Increased Corrosion of Stainless Steel Implants in Infected Plated Fractures , Arch. Orthop. Trauma. Surg. , Vol 102 , 1984 , p 198 – 200 12. Rae T. , The Action of Cobalt, Nickel, and Chromium...
Series: ASM Handbook
Volume: 5B
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v05b.a0006027
EISBN: 978-1-62708-172-6
... of cobalt oxides over an aluminum substrate. Cobalt-base conversion coatings are being developed for the marine, automotive, and aerospace industries. These coatings are being developed for use on tin plate and zinc for galvanized surfaces. They have met with little success on aluminum...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003215
EISBN: 978-1-62708-199-3
... and forms a stable specie upon combining with the stabilizing agents/catalysts. These agents permit the trivalent chromium ion to be stable in solution until it is plated out at the cathode. Table 7 summarizes the typical operating conditions for trivalent chromium processes. Table 7 Typical...
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001261
EISBN: 978-1-62708-170-2
... current densities than tank plating, which translate into higher deposition rates, up to 0.010 mm/min (0.0004 in./min). In addition, inherently precise thickness control permits plate buildup or repair without the need for subsequent machining. In regard to deposit hardness, a 70 HRC trivalent chrome...
Series: ASM Handbook
Volume: 2
Publisher: ASM International
Published: 01 January 1990
DOI: 10.31399/asm.hb.v02.a0001119
EISBN: 978-1-62708-162-7
... include arsenic, beryllium, cadmium, chromium, lead, mercury, and nickel. Arsenic Arsenic is particularly difficult to characterize as a single element because its chemistry is so complex and there are many different compounds of arsenic. It may be trivalent or pentavalent and is widely distributed...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003105
EISBN: 978-1-62708-199-3
..., galvanizing, thermal spraying Galvanizing very effective; plating with other metals used for both decorative appearance and corrosion protection Not recommended Galvanizing used in potable water Not recommended Not recommended Not recommended Painting: chemical treatment, priming and painting Most...
Series: ASM Handbook
Volume: 2
Publisher: ASM International
Published: 01 January 1990
DOI: 10.31399/asm.hb.v02.a0001092
EISBN: 978-1-62708-162-7
... for Large bearings X Punch and die assemblies Y Small bearings Y Anchoring for Rods and tubular members Y Bushings in drill jigs, plates, and fixtures C, Y, Z Inserts and parts in ceramics, plastics, metal powders, and wood G, Z Locator members in aircraft and automotive...
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001323
EISBN: 978-1-62708-170-2
...Plate characteristics of hard chromium plating and prospective alternative processes Table 1 Plate characteristics of hard chromium plating and prospective alternative processes Characteristic Chromium electrodeposition Low-phosphorus electroless nickel (generic) Ni-W-B...
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001245
EISBN: 978-1-62708-170-2
... hardness, 100 gram load 130 to 200 170 to 230 300 to 400 Internal stress, MPa 125 to 210 (tensile) 0 to 55 (tensile) 35 to 200 (tensile) (a) Antipitting agents formulated for nickel plating are often added to control pitting. (b) Organic additives available from plating supply houses...
Series: ASM Handbook
Volume: 13A
Publisher: ASM International
Published: 01 January 2003
DOI: 10.31399/asm.hb.v13a.a0003687
EISBN: 978-1-62708-182-5
... of substrate design features on electroplateability Feature Poor design Influence on electroplateability Better design Convex surfaces Ideal shape. Easy to plate uniformly, especially where edges are rounded Flat surfaces Use a 0.4 mm (0.015 in.) crown to minimize undulations caused...
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
... adhesion and continuity of the plated deposits. This improves corrosion resistance and serviceability. In terms of economy: Labor costs are lower than for buffing. Processes are readily adaptable to high-production parts that, because of their shape, cannot be finished on automatic buffing...