Tartaric Sulphuric Anodising - Poeton

Tartaric Sulphuric Anodising
The ultimate replacement for Chromic Acid
Anodising
Poeton Apticote 300TSA – Tartaric Sulphuring
Anodising – provides superb corrosion protection
and paint bonding properties for a wide range of
aluminium alloys. TSA is becoming standard for the
Aerospace and Defence industries, replacing the
environmentally unacceptable Chromic Acid
Anodising.
Adopted and specified by Airbus, the process has
been installed by Poeton at their Cardiff plant,
complying with AIPI 02-01-003 (Approved in June
2011) and BS EN 4704, supported by NDT and
painting facilities. We can offer a TSA service to all
our Aerospace and Defence customers, from initial
non-destructive inspection, through pre-treatment,
TSA processing, post-treatment and to final paint
priming.
Poeton Apticote 300TSA is the first and the best,
available now, with proven performance and
compliance.
Features
Total coverage
Excellent coating/substrate bond
Salt mist corrosion performance (ISO 9227)
complies with AIPI 02-01-003
Smooth, aesthetically pleasing
Maximised paint adhesion (ISO 2409), complying
with AIPI 02-01-003
A complete package – with NDT
and paint priming
Large plant capacity
Environmentally acceptable
Thickness and coverage
Apticote 300TSA provides a homogeneous coating
with a minimum thickness of 2 microns and a
maximum of 7 microns. It is evaluated by an eddycurrent
technique, in accordance with ISO 2360,
and by the coating weight, in accordance with
EN 12373-2.
Coverage of the part is evaluated by an ohmmeter -
Galvo Test 2 – using the insulating properties of the
film.
Corrosion protection
Salt spray tests are performed in accordance with ISO
9227, using aluminium alloy 2024 T3, on a TSA hot-water
sealed specimen (60 minutes at >96 o C) and on a TSA +
post-treatment process specimen (that is the Alodine 1200
Chemical Conversion Process).
Sample Period Outcome
TSA + seal 96 hours Zero pitting marks per
dm 2
TSA + post
treatment
Applications
336 hours Average of 1.7 pitting
marks per dm 2 . Max
pit size 0.7mm
Just some of the Apticote 300TSA applications:
Launch rails
Actuators
Fuel pipes and connectors
Landing gear
Missile locks and ejectors
Underwater weapons
Generically, Apticote 300TSA is used:
TSA
For electrical insulation
For protection under mildly corrosive conditions
As a surface key for paint application
When it is important to minimise fatigue loss
As an environmentally acceptable replacement for
chromic acid anodising

Substrates
Apticote 300TSA can be applied to all aluminium
alloys, including those commonly used in aerospace
and defence applications - 2124 (T3), 7175 and
6082.
Surface morphology
In comparison to Chromic Acid Anodised surfaces,
Apticote 300TSA gives a slightly coarser grain
structure, with additional surface porosity. It provides
the optimum adhesion for subsequent paint priming
without compromising the corrosion protection.
Fatigue
Apticote 300TSA is applied to the AIPI 02-01-003
specification. Rotating bar tests have shown that the
fatigue life of TSA treated aluminium alloy samples is
identical to that produced after Chromic Acid
Anodising.
Non Destructive Testing
Liquid Penetrant
Inspection (LPI)
Poeton Laboratory
Poeton offer a comprehensive
non-destructive testing service,
including Liquid Penetrant
Inspection (LPI). All parts are
individually inspected for
cracks, porosity, weld defects
and any manufacturing or
casting imperfections that
might subsequently impair the
TSA step.
We work to a strict Quality Plan, dictated by the
customer Specification, overseen by our laboratory.
Our facilities include:
Optical Microscopy
Scanning Electron
Microscopy
Metallography
Chemical analysis
Atomic Absorption
Technique
Corrosion testing
Adhesion testing
Wear testing
Salt fog cabinet
We are able to undertake all the required analysis for
bath control, fully complying with the specifications –
for instance, acid concentration (to AITM 3.0030) and
dissolved aluminium (by Atomic Absorption).
Our processing capability
Our TSA processing line is fully automated and computer
controlled:
Sizes up to 0.5 metre and 20 kg
Automatic voltage ramping
Precisely controlled sequencing – pre-treatment, TSA,
post-treatment
Bath temperature control to within 1 o C
NDT capable of inspecting parts up to 1 metre long,
and smaller parts at 50 per hour
Painting priming on parts up to 2 metres long and
smaller parts in batches of 200
Painting
TSA processing facility
Poeton have a large paint application facility,
environmentally controlled and using primers that are
chromate free. We can process parts up to 2 metres long
or 50 kg in weight, or batches of smaller parts up to 200 at
a time.
When applied to Apticote 300TSA treated aluminium, the
primer adhesion matches the performance specified in the
ISO 2409 Crosscut Test.
Environmental aspects
Companies like AIRBUS are committed to eliminating
chromates from all treatment process associated with
aircraft parts, including banning the use of Chromic Acid
Anodising. Poeton Apticote 300TSA is completely
chromate free, using only tartaric and sulphuric acid, in
plant that is newly manufactured.
Apart from observing the obvious precautions of working with
strong acids, the two bath constituents are relatively nonhazardous,
and none of the constituents meet the SVHC
criteria of REACH legislation.
Disclaimer
The information contained in this leaflet is intended for guidance only.
Whilst every effort is made to understand the environment in which the
coating is designed to work, success can only be determined by trials
and in-service testing.
NADCAP Accreditation is held by Poeton Industries Ltd with Poeton (Gloucester)
Ltd Accredited for Plasma Spray (coatings) and Chemical processing, and Poeton
(Cardiff) Ltd Accredited for Chemical Processing and NDT
Poeton Industries Ltd,
Eastern Avenue,
Gloucester, GL4 3DN
For more information, please contact our
Sales or Technical Department, (44) 1452
300 500, info@poeton.co.uk
April 2012