There are certain situations where chemical compounds can be used to obtain information needed to ensure work proceeds safely and with quality in mind. At HI-Tech Testing, we understand these situations and are knowledgeable in their application. Copper Sulfate solution can be used to determine the presence or absence of stainless steel on a carbon steel substrate. A Ferroxyl solution can be used to detect the presence of carbon contamination of a stainless steel weldment. Etchants are used to detect weld boundaries or the remnants of an arc strike on a critical surface.