Crack diagnosis spray | 3-piece set

Crack Detector Spray – 3 Piece Set (Item Number: 311053)

This professional, three-piece crack detector spray set is an essential tool for detecting damage to the internal microstructure of aluminum structures, especially hairline cracks. The set is an ideal choice for a comprehensive inspection of body components, such as MacPherson strut towers, particularly when assessing damage after an accident. The method is extremely sensitive, allowing even the smallest defects to be identified while being gentle on the inspected surfaces.

Product Description and Operating Principle

The basis of crack testing is the utilization of the capillary principle. The penetrant (diffusing red dye) found in the set, when applied to the surface, penetrates the finest cracks and pores. After cleaning the surface, the applied white developer attracts the penetrated dye, which, against the white background, reveals the hidden defects by forming an extremely contrasting pattern.

Main Advantages:

• High Sensitivity: Thanks to the high-contrast system, even microscopic cracks are easily noticeable.

• Material Compatibility: The agents do not have a negative effect on welds or treated surfaces.

• Residue-free Cleaning: The test materials can be easily removed from the surface with the test material cleaner without leaving any residue behind.

• Area of Application: Excellently suited for inspecting large surfaces, especially for damage detection on aluminum body components.

Set Contents and Application Guide

The 3-piece set contains all the necessary chemical agents for the test in optimal sequence.

Set Components (Item Numbers and Descriptions)

Note: Based on the description, the set includes products 311050 (Red penetrant) and 311051 (Cleaner), as well as a developer spray (likely Ardrox 9D1B), although its item number is not explicitly listed in the main product description.

Detailed Application Process

To ensure maximum accuracy, the following steps must be strictly followed:

1. Surface Preparation: Thoroughly clean the surface to be inspected with the Ardrox 9PR5 cleaner (311051). This ensures that the surface is free of grease, oil, and contaminants.

2. Penetration: Apply the developing red Ardrox 9VF2 penetrant (311050) onto the area to be inspected. Allow to act for approximately 10-20 minutes. This time is necessary for the penetrant to penetrate even the smallest cracks with the help of capillary forces.

3. Cleaning: After the action time has elapsed, thoroughly clean the surface again with the Ardrox 9PR5 cleaner. It is important that no excess penetrant remains on the surface, only that which is in the cracks.

4. Development: Apply the developer spray (Ardrox 9D1B), until a uniform white layer is formed. The developer reacts with the penetrant in the cracks.

5. Inspection: Inspect the surface. Red lines or dots appearing on the white background indicate structural defects or cracks.

Related Accessories and Temperature Monitoring Devices

Wielander + Schill offers a range of accessories that can assist in body repair and heat treatment processes, especially when machining aluminum parts.

Temperature Indicators

These devices are essential for monitoring heat treatment processes (e.g., welding, heating) to ensure that critical temperature thresholds are not exceeded, which could lead to damage to the aluminum structure.

Temperature Indicator Strips (6 points, max. 160°C)

• Part number: 311060

• Features: Cost-effective solution for mass application, compact design. Indicates irreversible temperature overshoot. Features a horizontal, six-digit scale in degrees Celsius (°C).

• Application: Temperature monitoring when heating aluminum parts, for example, before welding or straightening work.

• Packaging quantity: 1 x 10 sheet.

Temperature Indicator Strips (6 points, max. 127°C)

• Part number: 311061

• Features: Similar to the 160°C version, this strip indicates the 127°C temperature threshold. Ideal for lower temperature processes.

• Packaging quantity: 1 x 10 sheet.

Temperature Indicating Pencils (With Calibrated Melting Point)

These temperature indicating pencils feature a calibrated melting point. When the indicated surface temperature reaches the nominal value of the pencil, the mark melts (runs off), providing a clear visual indication. Accuracy: +/- 1% compared to the nominal temperature.

Application areas: Welding and metal processing, preheating, intermediate storage, post-weld heat treatment, annealing, stress relief welding.

Application method: Mark the workpiece before or during heating. The melting (flowing) of the marking makes it clearly visible when the temperature is reached. This method is most suitable for smooth surfaces.

Product Identifier: 311053

Category: Products / Welding Technology / Shielded Gas Groove Welding / Further Accessories