The invention relates to a detection method of plated layer 
corrosion rate in a steel wire or a steel 
wire rope. The method comprises the process steps that: 1, a sample is prepared, wherein a plated steel wire or steel 
wire rope is 
cut into N segments; the surfaces are cleaned by using 
alcohol cotton; and the ends are sequentially sealed by using a 
solid sealant (AB composite 
adhesive), such that N samples are prepared; 2, the samples are weighed; 3, a 
salt spray test is carried out, wherein the weighed samples are subjected to a neutral 
salt spray test in a salt spray box; 4, the surfaces of the samples are cleaned, wherein the samples after the 
salt spray test are washed in a container with a prepared 
chromic acid cleaning agent, such that residual salt and corrosives on the surface of the samples are completely removed; the samples are washed by using water, and are dried; and 5, weighing and calculation are carried out, wherein the dried samples are weighed, and the weights are adopted as after-test weights; and the 
corrosion rate is calculated according to the 
weight loss before and after the test. With the method provided by the invention, 
corrosion-resistant rates of various plated 
layers can be easily determined, and the service lives of the plated layer samples in the environment can be inferred.