What type of non-destructive testing can be used on aluminum parts to detect surface defects?

Visual testing is an essential non-destructive testing (NDT) method commonly used to identify surface defects on aluminum parts. This technique involves a detailed inspection of the surface for any irregularities such as cracks, dents, corrosion, or other flaws. It is often the first line of defense in assessing the structural integrity of components, as it can be performed quickly and without the need for sophisticated equipment.

The effectiveness of visual testing lies in its ability to reveal many potential issues that could compromise the safety or functionality of a part, which is crucial in aviation applications. Inspectors often use magnifying glasses, borescopes, or other aids to enhance their ability to spot small defects that may not be immediately visible to the naked eye, ensuring that potential concerns are identified and addressed early.

Other methods, while useful in the broader context of material testing, may not be specifically aimed at detecting surface defects on aluminum as directly as visual testing. For instance, hammer testing is generally used to assess internal defects or structural integrity rather than surface concerns, and chemical analysis focuses on the composition of materials. Electrical resistance testing can be utilized for various purposes, including assessing material thickness, but it does not primarily target surface defects like visual inspection does.