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Salt Spray and Paint Adhesion Properties of BSAA Aluminium Alloys

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Salt spray chamber for Renault corrosion test

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French automotive manufacturer has their own variant of the cyclic chamber corrosion test, designated D17 2028 often referred to as ECC-1. In contrast to typical salt spray irrigation rates of 1 to 2 ml/ 80 sq.cm/hour, the Renault test calls for a higher irrigation rate over a shorter time typically 5 ml/80 sq. cm/hour for 30 minutes followed by controlled humidity at 35°C. A salt spray cabinet meeting these specifications with numerous other features, is provided by Ascott Analytical (www.ascott-analytical.com).

Salt Spray Corrosion Failure of Electroless Nickel Coated Steel Brake Pistons

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Case study of German Co. where random samples of E/N plated brake pistons failed salt spray test. Cause was tracked down to HCl etch used to pickle incoming steel which was slightly rusted. Pickling acid was changed (to what not stated) as was electrocleaning procedure & problem disappeared.

Salt spray corrosion resistance of HAE, Dow 17 & Tagnite coatings

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Compares the performance of three proprietary Mg anodised coatings, the latter using a plasma anodising method. Report avail. on the web.

Salt Spray Corrosion Studies of Electroless Nickel Plated Magnesium Alloys

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Salt spray corr'n tests of Mg alloys coated with electroless Ni of various thicknesses, with and without add'nl barrier layers. The latter gave little extra corr'n prot'n. The effect of substrate surf. roughness is also shown. Post-plates incl. Sn(with & w/o heat reflow), Zn, Cd, Au,Ag & black Ni were beneficial or detrimental, according to their e.m.f ranking. Samples were assessed on ASTM rating scale. 7 refs. Disc'n p200.

Salt Spray Corrosion Test Cabinet Mixing Apparatus

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Salt Spray Corrosion Test Chamber

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Salt spray corrosion testing

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Exposition of corrosion mechanisms taking place in this test & discussion of "white rust" on zinc or chromated zinc, and when is this considered to be corrosion, and when is it staining. Simple tests resolve this. Comments on cutting large components to fit within a test chamber & how to mask cut edges. Corrosion occurrence within 1cm of cut edge can be ignored.

Salt spray corrosion testing

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Three experts offer comments on this accelerated test method, alternative test methods and shortcomings of the salt spray test. Reference is made to the book "Accelerated Testing" by Ulrich Schulze. (www.europeancoatings.com/books)

Salt Spray Corrosion Testing - Some Problems & Suggestions for Improving Confidence

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Comment on what these tests actually measure and how to interpret results. Survey of factors which could give erroneous results, incl. presence of rust from previous runs or corrosion of cabinet itself. 9 refs.

Salt Spray Corrosion Testing of Tin Plated Copper

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Salt spray corrosion testing of tin plated Cu is linked to porosity and thickness and a parabolic kinetic rate expression is shown. Porosity & thickness can thus be used as predictors. 13 refs.

Salt spray corrosion tests - not always a fair comparison

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Critique of ASTM B117 (and related), reviewing factors that can cause discrepancies, variability between cabinets, variability between test panels & actual components, assessment of results and subjectivity in this and finally the question "How useful a test is this ?".

Salt spray failures on anodised aluminium

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Detailed treatment of the various reasons why samples fail ASTM B117, incl. contamination levels at various stages of anodising. Detailed troubleshooting tables. Numerous tips for implementing the test procedure. 52 refs

Salt Spray Failures: Recommendations for Troubleshooting Causes

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Protocol is suggested to diagnose samples failing salt spray test, largely in terms of changes in processing (coating) such as de-oxidiser or Alodine conc'ns. 3 refs.

Salt spray test chamber with electronic catchpots

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Brief description of proprietary (Ascott Analytical) salt spray test chamber where electronic catchpots allow monitoring and control of the rate of salt spray irrigation, typically 1 - 2 ml/80 sq. cm collection area.