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ENVIRONMENTAL SIMULATION

Product life-cycle reliability

 

ENVIRONMENTAL SIMULATION

Product life-cycle reliability

For many products, the lifespan is influenced by environmental factors. Oxygen, salt, UV radiation but also temperature and humidity play an important role in product aging. Since aging usually progresses over years, estimating the aging development is the objective. By means of targeted and accelerated tests, various materials and suitable protective measures can be tested and compared in a shortened time frame. This ensures product life reliability.

CORROSION TEST

Corrosion not only influences aesthetics, but also the functionality of components. By means of infiltration corrosion, for example, parts of a material composite can debond, protective lacquers can peel off, etc. Corrosive substances are thus intensified and concentrated on the test specimens or components to provoke a corrosive attack in a shorter period of time. Standardized procedures are generally used. In consultation with the customer, special procedures are also possible.

ACCELERATED AGING

Even if polymers do not rust, they are still subjected to environmental degradation. Their properties and thus their function may change, as the plastics become brittle or discolored, which affects the ductility and translucence. In order to characterize this behavior, plastics are subjected to accelerated aging in contact with concentrated chemicals, UV radiation or in temperature and humidity alternating climate conditions. This allows the behavior to be determined after a relatively short time and to enable a selection of suitable materials or additives.



COATING TESTS

Coatings often have an aesthetic and / or a protective (anti-corrosive) function. How well the coating performs this function can be determined by means of specific tests. Depending on the method, the coating is damaged or left intact and subsequently exposed to corrosive media and possibly a mechanical load. Ultimately, the appearance (e.g., gloss loss, color changes, sub-migration, etc.) and / or adhesion (e.g., cross-cut) are examined.


machines / methods

NSS

neutral salt spray according to ISO 9227

Corrosion tests in artificial atmospheres (solution of sodium chloride spray) to evaluate corrosivity of metals or mettalic coatings with or without corrosion protection.

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sample preparation by agreement
test chamber Erichsen 606 / 1000
test temperature (35±2)°C
test solution neutral, (5±0.5)%  NaCl-solution with a pH-of 6,5 – 7,2.
test duration by agreement
evaluation of the samples by agreemen e.g.
  • optical evaluation of possible intrusion corrosion or blistering at the diagonal cross
  • optical evaluation of unharmed, lacquered surfaces regarding blistering according to ISO 4628-2
  • optical evaluation of non lacquered surfaces for pitting corrosion according to ISO 8993

AASS

acetic acid salt spray test according to ISO 9227

Corrosion tests in artificial atmospheres (solution acetic acid salt spray) to evaluate corrosivity of metals or mettalic coatings with or without corrosion protection.

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sample preparation by agreement
test chamber Erichsen 606 / 1000
test temperature (35±2)°C
test solution acetic acid, (5±0.5)%  NaCl-solution with a pH-of 3,1 – 3,3.
test duration by agreement
evaluation of the samples by agreemen e.g.
  • optical evaluation of possible intrusion corrosion or blistering at the diagonal cross
  • optical evaluation of unharmed, lacquered surfaces regarding blistering according to ISO 4628-2
  • optical evaluation of non lacquered surfaces for pitting corrosion according to ISO 8993

CASS

copper-accelerated acetic acid salt spray test according to ISO 9227

Corrosion tests in artificial atmospheres (solution of copper-accelerated acetic acid salt spray) to evaluate corrosivity of metals or mettalic coatings with or without corrosion protection.

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sample preparation by agreement
test chamber Erichsen 606 / 1000
test temperature (35±2)°C
test solution acetic acid, (5±0.5)%  NaCl-solution with 0.026% CuCl2.2H2O and a pH-of 3,1 – 3,3.
test duration by agreement
evaluation of the samples by agreemen e.g.
  • optical evaluation of possible filiform corrosion or blistering at the diagonal cross
  • optical evaluation of unharmed, lacquered surfaces regarding blistering according to ISO 4628-2
  • optical evaluation of non lacquered surfaces for pitting corrosion according to ISO 8993

VDA climate change

VDA-climate change according to VDA 621-415

Cyclial corrosion tests in artificial atmospheres (salt spray / condensation / atmospheric) to evaluate corrosivity of metals or mettalic coatings with or without corrosion protection.

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sample preparation by agreement
test chamber Erichsen 606 / 1000
test condition

A cycle of the VDA climate change (duration 7 days) is defined as 

  • 1 day salt spray test according to ISO 9227 NSS
  • 4 days condensation climate change-according to ISO 6270-2 AHT *
  • 2 Tage atmospheric conditions

* a cycle day is defined as follows: samples are exposed 8h at 40°C / 100 %r.H. condensation occurs during that time. Afterwards the samples are stored at atmospheric conditions for 16 h.

test duration by agreement
sample evaluation by agreement

Filiform corrosion test

filiform corrosion test according to DIN EN 3665 A 3

Evaluation of protection by coating of aluminum alloys against filiform corrosion.

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sample preparation

Die Lackschicht der Proben werden mit dem Ritzstichel nach Sikkens mit zwei ca. 50 mm langen, rechtwinklig zu einander stehenden Ritzkerben, welche bis ins Grundmaterial reichen, verletzt.

initiation Animpfung der Proben während 60±5 Minuten in einer HCl-Gas enthaltenden Kammer mit anschliessender Zwischenlagerung bei Raumklima während 30 Minuten.
Exposure

samples are exposed at (40±2)°C and (82±3)% r.H.

test duration by agreement
sample evaluation optical evaluation of filiform corroion formation according to DIN EN A3

Kondenswasser Konstantklimatest

Kondenswasser Konstantklimatest nach DIN EN ISO 6270-2

Bestimmung der Beständigkeit von Probekörpern in Kondenswasserklimaten.

Details anzeigen
Probenvorbereitung

Gemäss Absprache

Prüfkammer Liebisch KSW 300
Prüfbedingungen

(40±3)°C; 100% rel. Feuchtigkeit mit Betauung der Probenoberfläche

Prüfdauer Gemäss Absprache
Probenbeurteilung Gemäss Absprache

Kesternichtest

Kesternichtest nach DIN 50018 KFW 2.0S

Beurteilung der Beständigkeit von Werkstoffen gegenüber kondensierender, schwefeldioxidhaltiger Feuchtigkeit.

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Probenvorbereitung

Gemäss Absprache

Prüfkammer Liebisch KSE 300
Prüfbedingungen

8 Stunden (40±3)°C, bei 100% rel. Feuchtigkeit mit Betauung der Probenoberfläche und mit 0,66% V/V SO2 Belastung. Anschliessend 16 Stunden bei Raumklima. Dieser 24h-Zyklus entspricht einer Prüfrunde

Prüfdauer Gemäss Absprache
Probenbeurteilung Gemäss Absprache

QUV-B

QUV-B - Test nach ASTM G 154 - 06

Beurteilung der Beständigkeit von Beschichtungen gegenüber ultravioletter Strahlung im Wechsel mit kondensierender Feuchtigkeit.

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Probenvorbereitung

Gemäss Absprache

Prüfgerät QUV Schnellbewitterungsgerät, Modell: QUV/se
Strahlungsquelle UVB 313 Lampe
Schwarztafeltemperatur

Während der Bestrahlungsphase 60°C,

während der Betauungsphase 50°C

Prüfbedingungen

4 Stunden Bestrahlung anschliessend
4 Stunden Betauung im Dunkeln

Prüfdauer Gemäss Absprache
Probenbeurteilung Gemäss Absprache

Auslagerungen

Wechsel- und Konstantklimaauslagerung

Bestimmung der Beständigkeit von Probekörpern in Wechsel- oder Konstantklimaauslagerungen.

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Probenvorbereitung Gemäss Absprache
Prüfkammer

Vötsch VC 7034

Temperaturbereich -70 bis +180°C
Feuchtebereich 10 bis 98% r.F.
Prüfdauer Gemäss Absprache
Probenbeurteilung Gemäss Apsprache

Tauchtests

Wechsel- und Dauertauchtests

Bestimmung der Beständigkeit von Probekörpern in Wechsel- oder Dauertauchtests in unterschiedlichen Prüfmedien.

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Probenvorbereitung Gemäss Absprache
Prüflösung Verschiedenste Prüflösungen möglich
Prüftemperatur Gemäss Kundenwunsch
Prüfdauer Gemäss Absprache
Probenbeurteilung Gemäss Apsprache

Spannungsrisskorrosionstests

Spannungsrisskorrosionstests gemäss LN 65666, VG 95105, ASTM G44-99

Beurteilung der Beständigkeit von Aluminium-Knetwerkstoffen gegen Spannungsrisskorrosion.

Details anzeigen
Probenvorbereitung Gemäss Absprache
Prüflösung Verschiedenste Prüflösungen möglich
Prüftemperatur Gemäss Kundenwunsch
Prüfdauer Gemäss Absprache
Probenbeurteilung Gemäss Apsprache

Contact environmental analysis


Christoph Deola

After his training in the pharmaceutical industry as a chemical laboratory assistant, Christoph Deola gained professional experience in the field of material testing in the machine industry. After his further training as a technical businessman, he built up profound knowledge in the field of surface treatment and corrosion testing at Alusuisse AG, focusing on environmental simulation tests. He still looks after this area for Suisse Technology Partners today.

umwelt@suisse-tp.ch +41 52 551 1151