Porsche PPV 4017 Surface Protection - Corrosion Test - Modified Climate Change Test

Developed by Porsche, a German automobile manufacturer owned by Volkswagen, the “Porsche PPV 4017 Surface Protection - Corrosion Test - Modified Climate Change Test” standard aims to ensure the surface protection of materials used in production by conducting modified climate change tests to determine their resistance to corrosion.

Corrosion protection means a method of reducing or preventing corrosion of material through cathodic protection, the application of protective coatings, or the use of a stainless material in its construction.

Corrosion protection is crucial to the structure, appearance and long-term integrity of a vehicle. To make them corrosion resistant, special treatments are applied to the interior of body parts, the underbody and the engine.

Corrosion protection provides a barrier against corrosive environments such as salt, dirt, dust and moisture and overcomes several limitations presented by alternative technologies, such as low surface preparation requirements, exceptional penetration capabilities, resistance to fracture and self-healing properties.

Corrosion is not always obvious. However, just because it is not visible does not mean that it is not corroding. Corrosion in the automotive industry is important to addressing the rust problem in the automotive industry. Despite its well-painted and coated exterior surfaces, a vehicle body is subject to significant corrosion stresses everywhere, especially in areas that include body cavities, underbody, hinges, and engine room areas that are constantly exposed to condensation, rain, mud, snow, salt, and more. The original paint layers, no matter how strong, are not able to protect these areas from corrosion on their own and require additional coatings. Due to the complex geometry of vehicle parts, protecting the interior metal parts of vehicles from rust and corrosion presents a challenge.

The different types of corrosion that affect automobiles necessitate various tests. Atmospheric corrosion can occur when any metal surface of a vehicle comes into contact with air containing moisture. Under conditions of sub-zero humidity, a thin film of moisture accumulates and is sufficient to cause gradual decay of steel surfaces. The thickness of the film depends on factors such as ambient temperature and pressure, relative humidity and the presence of salts.

Crevice corrosion refers to electrochemical processes that occur in confined spaces such as seals, flanges, and cavities filled with deposits. This type of corrosion is a localized attack resulting from the presence of a stagnant solution or electrolyte.

Galvanic corrosion occurs when two different metals come into electrical contact. One metal may corrode first over the other. An example is the corrosion of nuts and bolts used to join components.

Pitting is another form of localized attack, similar to crevice corrosion. It usually occurs in passive materials where the passive oxide film protecting the metal is broken down by chemical or mechanical attack. Chlorine in salt water is very effective in breaking down such passive oxide films.

Environmental (climatic) conditions can play a significant role in corrosion, but the causes can extend to manufacturing processes . Coating services include powder coating, dry film lubrication, zinc nickel coating, porosity sealing, zinc plating, and electrolytic nickel plating. Applications include engine blocks and cylinder heads, air conditioning components, power steering and brake lines, fuel lines and fuel delivery systems, and brake calipers. In addition to their corrosion-inhibiting properties, coatings also provide wear resistance, anti-friction, anti-wear, electrical insulation when needed, and resistance to heat and sulfur corrosion. Advanced laboratories employ climatic testing methods to detect all these problems in advance.

Our organization has a strong staff that closely follows the developments in the world in the field of science and technology and constantly improves itself. Among the numerous test, measurement, analysis and evaluation studies provided for businesses in various sectors, there are also test services in accordance with the "Porsche PPV 4017 Surface protection - Corrosion test - Modified climate change test" standard.