Method for detecting oil content on foil surface of aluminum as well as aluminum alloy plate

Abstract

The invention provides a detection method for the oil content of the surface of aluminum and aluminum alloy sheets and foils, comprising the following steps that: reacting a sample to be detected of the aluminum and the aluminum alloy sheets and foils with diluted hydrochloric acid; dissolving oil substances on the sample surface into the hydrochloric acid solution during the reaction process; extracting the oil substances in the hydrochloric acid solution by carbon tetrachloride; quantitative detecting the oil substances by using oil measuring software of an infrared spectrometer; calculating the content of the oil substances in the oil measuring software by the absorbance of spectral bands with wave numbers which are relatively 2930cm<-1> (namely stretching vibration of C-H bond in a CH2 radical), 2960cm<-1>(namely stretching vibration of C-H bond in a CH3 radical) and 3030cm<-1> (namely stretching vibration of C-H bond in an aromatic ring). The principle of the detection method is scientific; the measuring method is simple and easy; the measuring result is accurate.

Description

technical field

[0001] The invention belongs to the field of chemical analysis, and more specifically relates to a method for detecting the oil content on the surface of aluminum and aluminum alloy plates, strips and foils. Background technique

[0002] In the production process of aluminum and aluminum alloy sheet, strip and foil, various oil products such as rolling oil, rolling mill lubricating oil and hydraulic oil are used, and the surface of the produced aluminum and aluminum alloy sheet, strip and foil will contain a certain amount of oil. The oil content on the surface of aluminum and aluminum alloy sheet, strip and foil is an index for evaluating the performance of the rolling mill and an index for the performance of the product process. The oil content will affect the formulation of various processing procedures (such as degreasing, etc.) in the future. , so it is very necessary to measure the oil content on its surface. At present, there is no method for measurin...