BS EN ISO 14604 is an international standard on fine ceramics which covers methods of test for ceramic coatings.
BS EN ISO 14604 describes a method of measuring the fracture strain of ceramic coatings by means of uniaxial tension or compression tests coupled with acoustic emission to monitor the onset of cracking of the coating. Tensile or compressive strains can also be applied by flexure using four-point bending. Measurements can be made in favourable cases at elevated temperatures as well as at room temperature.
BS EN ISO 14604 on ceramic coatings is useful for:
Industry-grade ceramic coating is a chemical polymer solution that is applied to the exterior of a surface to protect it from external paint damage. Typically applied by hand, it blends with the paint of your surface and creates an additional hydrophobic layer of protection.
The fracture strain of a coating is a critical factor often determining the performance of a coated product. Clearly, if stressed either directly or due to thermal effects (thermal expansion coefficient mismatch between the coating and substrate) coating cracking can occur if the critical fracture stress/strain is exceeded, and in many cases the effectiveness of the coating will be reduced. For example, corrosion-resistant coatings loose their protective character if cracking occurs, and optical coatings become ineffective when cracked. In many cases, cracking is the first stage of a much more serious form of failure in which large areas of the coating can spall.
BS EN ISO 14604 describes a method for the determination of fracture strain using a technique of applying stresses to a coupon of material by a uniaxial tensile or compressive test or a beam bending test where the initiation of fracture in the coating is determined using an acoustic emission method. This can help you evaluate the performance of a coated product which can be used by you to make improvements.
EN ISO 14604:2016
ISO 14604:2012