aluminium corrodé

[multitruc]

Ma lolo a la maladie des lolo
en arrachant les caoutchouc de sol comme préconisé par tous les lotusiens, j'ai eu la mauvaise mais prévisible surprise de trouver de belles taches de corrosion assez profondes (alu bien granuleux au toucher).
forcement c'etait tout détrempé sous les plastiques de sol, ca devait stagner depuis 7 ans! et donc une pile s'est créée!

si il y a des spécialistes ici? je compte poncer les taches, et pour les "fixer" passer un coup de resine epoxy localement sur ces dernieres... puis poser des moquettes "libre" afin de surveiller et de faire secher si besoin.

question (etant dans l'aero je pense que ca colle comme raisonnement), si les traces "noires" de corrosion sont eliminées le processus est arreté? je peux donc mettre de l'epoxy en protection et roule martine (ah ben non elle roule maintenant celle là! )??

[Forthman]

Oui Oui, elle roule 

A ta place, j'y mettrai rien 
L'oxydation ne se fait qu'en cas d'humidité + autre alliage (pour faire une pile, il faut 2 métaux)
donc si ton plancher "respire" l'oxydation ne se propagera pas 

a+ François

[multitruc]

Oui Oui, elle roule 

A ta place, j'y mettrai rien 
L'oxydation ne se fait qu'en cas d'humidité + autre alliage (pour faire une pile, il faut 2 métaux)
donc si ton plancher "respire" l'oxydation ne se propagera pas 

a+ François

c'est ce que je pensais... je ponserais les taches a la dremel et on vera bien...

[multitruc]

c'est pas le miens mais pareil... pas beau hein!!!
et c'est quand meme le fond plat qui communique avec la route!

[Forthman]

Ouai... bof... c'est pas si terrible
C'est pas prêt de passer à travers 

a+ François

[multitruc]

mouaih... 1.5mm la tole! ca va vite

[Godinou81]

Ouai... bof... c'est pas si terrible
C'est pas prêt de passer à travers 

a+ François

Comme dit en MP :

Avant que ce soit perforant, y a de la marge, alors pour moi, il est surtout urgent de ne rien faire, à moins que 2 ou 3 personnes qui en ont vu passer des dizaine, te conseille quelquechose.

Perso, je ne sais pas quel traitement a reçu l'alu du planché, donc avant de foutre quoique ce soit ou de "ponser au dremel"...

Moi à ta place je nétoirrai simplement, avec un peu de solvant pour anlever les traces de colle. Et parès tu passes chez Lotus à Pairs pour demander avis. t'es pas loin c'est facile.

[multitruc]

oui, mais de laisser l'alu brut" en le ponsant ou laisser les "champignon" de corrosion, je prefere les enlever!
lundi j'appelle mon "labo" (on fabrique des trains d'aterrissage airbus et dassault) ils me diront bien!

[jma]

Juste en passant, comme c'est mon activité actuelle (je gratte du platre ) , est ce que Béné peut vous demander de mettre un "C" ou un "Ç "  à "poncer ou "ponçage", ça pique un peu les yeux .

Merci Béné!

[multitruc]

tout ce qui est en haut du clavier, c'est trop compliqué pour moi, y'a le choix entre 3 trucs à chaque fois!!!

[miatissime]

tout ce qui est en haut du clavier, c'est trop compliqué pour moi, y'a le choix entre 3 trucs à chaque fois!!!

   T'est pas multi-trucs toi ? 

[PROVAMO]

  T'est pas multi-trucs toi ? 

Mais il ne se sert que d'un doigt sur le clavier ! 

[Bruno]

Mais il ne se sert que d'un doigt sur le clavier ! 

Non, ça c'est moi

[Godinou81]

Moi c'est pas pareil, je suis illettré...  

[lab]

Pour Multitruc
Tu nettoies
Tu prends de la laine de fer Triple 0 ,et, tu pulvérises du Wd 40 .(juste de quoi humidifier)
Avec la paille de fer ,tu frottes en faisant des beaux ronds .
Utilise autant de paille de fer que tu veux .
Tu devrais bien récupérer ton aluminium .

Une fois bien sec ,tu peux passer un coup de polish ,où,une couche de vernis .

Voilà

[Forthman]

Pas de paille de fer malheureux ! 

Dans "paille de fer" il y a "fer" et le fer ça rouille !

Je me rappelle quand j'étais moins vieux (je devais avoir 11 ou 12 ans), j'avails nettoyé une casserole à ma môman
avec une brosse métallique montée sur une perceuse.
Cette casserolle était en INOX, et bien quelques semaines plus tard, elle est partie à la poubelle car elle était
toute rouillée 

Sit Multi veut brosser, qu'il le fasse avec de l'abrasif en nylon 
genre ça chez casto : http://www.castorama.fr/store/rouleau-abrasif-nylon-vert-14cmx3m-PPRDm771897.htm

a+ François

[multitruc]

du bon papier de verre pour virer les asperitées et hop...

[multitruc]

je suis allé bien regarder de pres, les "piqures" les pires font quand meme 1petitmm de profondeur! il etait temps de mettre au sec !!!

[lab]

Non Forthman !
Ta Martine doit avoir un peu d'aluminium comme ma Caterham en a beaucoup
De la laine de fer triple 0 ,et, du belgom alu pour faire briller comme un miroir ,un bon lavage à l'eau ,un coup de polish ,et, cela brille longtemps ,lontemps !
Le 4 en 1 est en inox . Même traitement ,et, il brille comme un miroir .
ET, PAS DE ROUILLE

là ,je préconise le WD 40 pour accompagner la paille de fer pour éviter d'avoir le nettoyage à l'eau à réaliser
Je parle par expérience ; huile de coude ,paille de fer triple 0............,et, le résultat sera ,na ,m'enfin 

[PROVAMO]

Olivier, tu aurais pu regarder sous les tapis avant de l'acheter ? 

[multitruc]

a voir... mais il faut deja que je m'attaque aux "piqures"

http://images.google.fr/imgres?imgurl=http://upload.wikimedia.org/wikipedia/fr/thumb/9/97/Piqure_aluminium.png/320px-Piqure_aluminium.png&imgrefurl=http://fr.wikipedia.org/wiki/Corrosion_aqueuse&usg=__CM0HWuol6BZD74GYcr8DnKv8oGo=&h=183&w=320&sz=25&hl=fr&start=5&um=1&tbnid=VvjFPNfn2DadFM:&tbnh=67&tbnw=118&prev=/images%3Fq%3Dpiqure%2Bcorrosion%2Baluminium%26um%3D1%26hl%3Dfr%26lr%3D

Voir rubrique aluminium... tres instructif meme si je me croirais au boulot!

[multitruc]

Olivier, tu aurais pu regarder sous les tapis avant de l'acheter ? 

ben non, ce sont des saloperies de plastiques collés!!! grosse erreur Lotus pris sous garantie corrosion jusqu'a 8 ans!
c'est aussi chiant a decoller que du vieux lino!!!

[multitruc]

un peu long, mais voila la procedure Lotus...
aluminium + eau + chlore! (colle des tapis) = grosse bouffade d'alu!

en tout cas, de ce que je comprend (procedure B a la fin) il faut poncer ou percer les zones de corrosion...


In order to inhibit the potential development of cosmetic corrosion of the
top surface of the footwell floors, owners of Elise models factory fitted
with either the black synthetic (rubber like) or grey synthetic chequer
plate patterned footwell mats, should be offered the opportunity of
upgrading from these mats to the new breathable carpets.
This bulletin describes the procedure for examining and assessing
the footwell floors, and specifies the appropriate recommended floor
treatment before fitting breathable carpet.

Preparation
1. From both footwells, remove all floor covering, including
where fitted; synthetic mat, carpet, foam insulation, sound damping sheet;
to reveal the alloy footwell floor surface. If fitted, remove the passenger
footrest.

2. If corrosive deposits of either a powder or paste like
nature are present, wear suitable hand and eye protection, wash the footwell
floor using a nylon brush and clean water. Mop the floor using paper towels
and allow to dry thoroughly.

3. Remove any double sided tape residue using a plastic spatula
(e.g. ice scraper) and proprietary Brake Cleaner fluid observing all
appropriate health and safety precautions.

4. Examine the floor surface for evidence of corrosion.
a). If no significant signs are apparent, with only
discoloration, staining (but no significant areas of dark grey) and/or fewer
than 10 superficial surface defects, 'Procedure A' below describes the
recommended procedure for protecting the footwell surface and fitting
breathable carpets.
b). If corrosion of either footwell is found to be in excess of
that described in (4a), 'Procedure B' below describes the recommended
procedure for fitting secondary floor panels and breathable carpets.

Procedure A

Parts Required (as necessary) Part Number
Qty
Carpet Set, RHD, black A117V0733S
1
Carpet Set, LHD, black A117V0734S
1
Fixing Stud, lower A117U6009F
4
Fixing Stud, upper A117U6008F
4
Velcro Strip, hook, self adhesive A111V6020V
0.5m
ACF 50 Solution A117A0239S
1

1. If not already fitted, position two new carpet retaining
studs in each footwell using the new carpet as a template, and stick to the
floor using a suitable locally sourced proprietary adhesive (e.g. Sikaflex).
Stick half the length of Velcro strip to the front of each footwell approx.
20mm from the front edge, or from the passenger footrest.

2. Spray the whole top surface of the footwell floor panels
with ACF 50 (Anti-Corrosion Formula) solution A117A0239S, and wipe dry using
paper towels. Apply a second coat to any areas showing evidence of
corrosion, and wipe dry. Allow to air dry thoroughly.

3. Fit a pair of new 'breathable' footwell carpets using two
fixing studs for each carpet. If applicable, refit the passenger footrest
and trim the carpet to suit. If the customer wishes to fit any additional
floor covering on top of the new breathable carpet, ensure this is properly
restrained using either the carpet studs, or some other secure device.

4. Ensure that the customer is made aware that the footwell
carpets should be lifted periodically and the floor cleaned and wiped dry.

.
Procedure B

Parts Required (as necessary) Part Number
Qty
Secondary Floor Panel Set A117A0235S
1
Betaclean 3900 Degreaser A100B6008V
1 litre
Betaprime 1707 A+B A111B6374V
2 x 160ml
Betaprime 5404 Primer A082B6337V
1 x 250 ml
Felt Applicator, Betaprime A000Z9088F
4
Betamate 2800 Adhesive B111B6159V
2 x 80ml
Mixer Nozzle, Betaseal adhesive A000Z9114F
2
Silastic RTV732, secondary floor panel A036E6027V
1 x 310ml
Carpet Set, RHD, black A117V0733S
1
Carpet Set, LHD, black A117V0734S
1
Carpet Fixing Stud, lower A117U6009F
4
Carpet Fixing Stud, upper A117U6008F
4
Velcro Strip, hook, self adhesive A111V6020V
0.5m
Tool Required
Applicator Gun, floor adhesive A117T0010S*
1
(*This tool will be mandatorily issued to all dealers and need not
be ordered)

1. Remove the footwell divider panel and (if fitted) carpet
retainer studs. Release all loose oxide from the footwell floors using a
stiff nylon brush. Clean all loose material and debris using a vacuum
cleaner. If any perforations are found, drill or file the holes to ensure
that all corroded material is removed from the perforation site. Remove any
burrs or sharp edges.

2. Dry fit the secondary floor panels, noting that the driver's
side panel needs to be flexed to clear the gearchange mechanism. Trim panel
edges if necessary to allow satisfactory fit. Note that any cut edges
should be cleaned and primed during steps (3) and (4).

3. Degrease the footwell floors and underside of the secondary
panels using Betaclean 3900.

4. Mix the two parts of the Betaprime 1707, and paint the whole
of the footwell top surfaces and underside of the two secondary floor
panels, using the felt applicator. Allow 30 minutes drying time.

5. Using Betaprime 5404, paint over the Betaprime 1707 on the
footwell top surfaces and underside of the two secondary floor panels.
Allow 15 minutes drying time. Then, for best results, continue immediately
with step 6.

6. Cut the adhesive mixer nozzle to provide a 5 - 6mm aperture,
fit onto the Betaseal 2800 twin pack cartridge, and insert into the
applicator gun. Extrude sufficient adhesive onto a paper towel to acheive a
consistently coloured black bead.

7. Addressing a single footwell floor, apply adhesive directly
to any floor perforations to fully seal each hole. Then carefully apply a
bead of adhesive around the periphery of the footwell floor, leaving a gap
of about 10mm to the edge. Apply a further bead of adhesive in a zig-zag
pattern as shown in the drawing overleaf. Note that the adhesive has only
an 8 minute 'open' time before the secondary floor panel must be fitted.

8. Place the secondary floor panel into the footwell and apply
even pressure to spread the adhesive. Ensure the panel is level and
correctly aligned before applying sand bag weighting at front and rear for a
minimum period of one hour. Check the underside of the footwell to ensure
that adhesive is extruded through any perforations and smooth the material
across the hole. Wipe off any excess. Clean any excess adhesive from
interior alloy surfaces using Betaclean 3900.

9. Fit a new mixer nozzle before repeating steps (5) to (8) for
the second footwell.

10. After a minimum period of 1 hour, apply a fillet of Silastic
RTV 732 (A036E6027V) around the edge of each secondary floor panel ensuring
that the joint is completely sealed. Smooth the sealant with a spatula for
a neat finish.

11. When the Silastic is cured (allow 1 hour), refit footwell
divider panel and passenger footrest.

12. Position the carpet studs using the new carpet as a
template, and stick to the floor using a suitable locally sourced
proprietary adhesive (e.g. Sikaflex). Stick half the length of Velcro strip
to the front of each footwell approx. 20mm from the front edge, or from the
passenger footrest.

13. Fit a pair of new 'breathable' footwell carpets using two
fixing studs for each carpet. If applicable, trim the passenger carpet to
suit the type of footrest fitted. If the customer wishes to fit any
additional floor covering on top of the new breathable carpet, ensure this
is properly restrained using either the carpet studs, or some other secure
device.

14. Ensure that the customer is made aware that the footwell
carpets should be lifted periodically and the floor cleaned and wiped dry.

Note that the footwell floors are not part of the primary
load bearing structure, such that any corrosion of these panels does not
compromise the integrity of the chassis. A corroded or perforated floor
panel is not in itself grounds for a U.K. MOT failure. Any queries should
be directed to the Vehicle Inspectorate Enquiry Unit on telephone number
0845 6005977, quoting vehicle test station number and the date of test.
Whilst the footwell condition of the majority of vehicles
will not amount to a failure under the terms of the 8-year chassis
anti-corrosion warranty provided with the vehicle, in order to maintain
customers confidence, Lotus will, as a goodwill gesture, undertake the above
treatment and improvements free of charge to any Elise within its 8-year
chassis anti-corrosion warranty which was factory fitted with the PVC based
floor mats (standard warranty terms and conditions will apply). Note that
this work does not extend the new vehicle corrosion warranty beyond the
original 8-year time period.

[ZEDGT]

     Pffffffffffffffff ! Ben disdonc !  En plus lotus est au courant ! 

C'est ce que l'on appelle une "auto-biodégradable" non ?   

[fentuz]

j'ai eu un soucis plus consequent... voici la reponse Lotus

From: "Massey, Dave" <DMassey@lotuscars.co.uk>
Date: 12 January 2009 16:49:46 GMT
To: "fentuz" <fentuz@forum-roadster.com>
Subject: RE: chassis

Dear Mr. Fentuz,
 
Our engineers have considered this case and can recommend the following action:
 
1.  The damage is not considered to have compromised the structural integrity of the chassis.
2.  The remains of the coin must be removed from the chassis, and the corroded area cleaned up/cut out using a Dremil type rotary tool.
3.  The exposed surfaces of the alloy must be protected from further corrosion using a suitable product such as ACF 50 available from motor and motorcycle accessory outlets, or from your dealer.
4.  The hole should be sealed to prevent water ingress using a suitable mastic sealant, such as Betaseal 1701 windscreen adhesive.
5.  For cosmetic purposes, an anodised aluminium patch could be stuck over the site.
 
I hope this helps, and you continue to enjoy the car.
 
Yours sincerely,
 
Dave Massey - Senior Technical Author
 
Tel: +44 (0)1953 608247
e-mail: DMassey@LotusCars.co.uk




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J'ai fait la reparation et la voiture a ete inspecte par un specialiste... Tout est OK...