Dacromet Test
Dacromet Test
Dacromet Test
REPORT 07MAAD9518
Monty Luke
Laboratory Manager
Materials Services
Amdel Limited shall not be liable for loss, cost, damages or expenses incurred by the client, or any other person or company, resulting from
the use of any information or interpretation given in this report. In no case shall Amdel Limited be liable for consequential damages
including, but not limited to, lost profits, damages for failure to meet deadlines and lost production arising from this report. This document
shall not be reproduced except in full and relates only to the items tested. Samples will be stored for thirty days.Ref:g:\auto\sent reports
2007\07maad9518 dalext\07maad9518 dalext.doc Page 1 of 6
This Laboratory is accredited by the National Association of Testing
Authorities, Australia. The test(s) reported herein have been performed
in accordance with its scope of accreditation. This document shall not
be reproduced except in full.
NATA Accredited laboratory No. 730
1. INTRODUCTION
Athan Lekkas of Dalext Products Pty Ltd supplied Amdel materials services laboratory with three
winch assemblies labelled as “Galvanised”, “Powder coat” and “Dacromet”.
The aim of the accelerated corrosion testing was to determine which coating process would be the
most effective in the prevention of corrosion.
2. PROCEDURE
The three winch assemblies were placed in the salt fog chamber and tested in accordance with
AS 2331.3.1 (equivalent to ASTM B117). The winches were inspected at regular intervals. At each
interval the samples were washed with warm running water to remove any salt deposits. Testing
was halted after the winches had been exposed for a period of 336 hours.
3. RESULTS
Remarks:
The “galvanised” winch is the least corrosion resistant of the three winches provided for testing. Within 24
hours exposure the zinc layer had been penetrated and was showing a significant amount of zinc corrosion.
The coating system was penetrated through to the basis material after 96 hours exposure.
The “Powder coat” winch has shown better corrosion resistance than the “galvanised” winch. The coating
system was not penetrated entirely through to the basis material after 336 hours. A slight amount of surface
corrosion was noted only.
The “Dacromet” winch is by far the best performing winch of the three, showing minimal change after 336
hours neutral salt spray exposure. Very minor surface staining was noted after testing.
PHOTO EXAMINATION
Fig 1: The “Galvanised winch” after 336 hours neutral salt spray testing.
PHOTO EXAMINATION
Fig 2: The “Powder coat” winch after 336 hours neutral salt spray testing.
PHOTO EXAMINATION
Fig 3: The “Dacromet” winch after 336 hours neutral salt spray testing.