Results 181 to 190 of about 5,025 (233)

Alternatives to Chromate conversion coatings for aluminium

Transactions of the IMF, 1984
SummaryThe development of solutions for depositing non-chromate conversion coatings on aluminium is described. The solutions are based either on trivalent chromium salts or aluminium salts. The corrosion resistance of these conversion coatings and their ability to secure the adhesion of subsequently applied organic coatings is described.
T. S. Sehmbhi, C. Barnes, J. J. B. Ward
openaire   +1 more source

Evaluation of chromate passivation and chromate conversion coating on 55% Al–Zn coated steel

Surface and Coatings Technology, 2004
Abstract Steel sheets coated with hot-dip 55% Al–Zn is used in situations where better atmospheric corrosion resistance is needed. This type of alloy coating exhibits greater durability due to aluminum barrier protection together with zinc galvanic protection. The surface treatments for this alloy are based on chromate.
A.M Rocco, Tania M.C Nogueira, Renata A Simão, Wilma C Lima   +3 more
openaire   +1 more source

Corrosion Performance of Field-Applied Chromate Conversion Coatings

Corrosion, 2002
Alternative conversion coatings designed to replace chromate conversion coatings (CCC) are typically compared to laboratory-prepared CCC with regard to stand-alone corrosion performance. This study seeks to determine the stand-alone corrosion resistance of field-applied CCC to establish a more realistic benchmark for new nonchromate conversion coatings.
R.B. Leggat, S.R. Taylor, W. Zhang, R.G. Buchheit   +3 more
openaire   +1 more source

Chromate-free conversion coatings on 1370 aluminum alloy

Protection of Metals and Physical Chemistry of Surfaces, 2012
Formation and protective properties of conversion coatings on 1370 aluminum alloy that were obtained in an IFKhANAL-3 alkaline conversion solution are studied. The subsequent filling of the coatings in an inhibitor solution is shown to produce coatings that are resistant to pitting corrosion in chloride environments.
Yu. A. Kuzenkov, S. V. Oleinik, S. A. Karimova, T. G. Pavlovskaya   +3 more
openaire   +1 more source

Non-Chromate Conversion Coatings for Magnesium Die Castings

SAE Technical Paper Series, 1997
<div class="htmlview paragraph">Hexavalent chromium-containing baths have traditionally been used as pre-treatments on magnesium alloys. Environmentally friendly alternatives to these baths are being investigated. One alternative seems to be a phosphate-permanganate treatment consisting of a mixture of sodium dihydrogenphosphate and potassium ...
Jan Ivar Skar, Manfred Walter, Darryl Albright   +2 more
openaire   +1 more source

Chromate conversion coatings on aluminium: influences of alloying

Corrosion Science, 2004
Abstract The growth kinetics of chromate/fluoride conversion coatings are examined for 99.99% aluminium, and Al–2.3at.%Cu, Al–1.9at.%Au and Al–20at.%Au alloys. The thickening of coatings and thinning of substrates, the latter deposited by magnetron sputtering, are determined by transmission electron microscopy.
Y. Liu, P. Skeldon, G.E. Thompson, H. Habazaki, K. Shimizu   +4 more
openaire   +1 more source

Analysis of Chromate Conversion Coatings on Aluminum

Japanese Journal of Applied Physics, 1974
Chromate conversion coatings are commonly used on aluminum surfaces to improve corrosion protection and to establish a base for paint primers, but the interaction of such coatings with the aluminum substrate is not understood in detail. A study has been made of two such coatings, Alodine 1500 on alclad 2024 aluminum, and Alodine 1200 alclad 7075 ...
openaire   +1 more source

High-resolution SEM studies of chromate conversion coatings

Journal of Materials Science, 1988
Scanning electron microscope studies have shown that chromate paint pretreatment of aluminium resulted in the deposition of a film comprising layers of spherical-shaped particles. On alkali-etched substrates the particle size varied from between 60 nm to less than 10 nm.
J. A. Treverton, M. P. Amor
openaire   +1 more source

A Comparison of Chromate-Phosphate and Chromate-Free Conversion Coatings for Adhesive Bonding

The Journal of Adhesion, 1997
Abstract Three different conversion coatings have been evaluated. One of these is an established chromate-phosphate treatment (BONDERITE 705) whilst the others are chromate-free (BONDERITE 777 and EP2472) and not widely used for adhesive bonding. In the present study, the degree of surface modification introduced by these treatments has been determined
G. W. Critchlow, D. M. Brewis
openaire   +1 more source

Chromate conversion coatings

Metal Finishing, 1995
Fred W. Eppensteiner, Melvin R. Jenkins
openaire   +1 more source