A corrosion-resistance testing method for a coated metal member formed of a metallic substrate provided with a surface treatment coating includes an electrification step for applying a voltage and/or a current between a surface of the surface treatment coating and the metallic substrate in a state where a corrosion factor is in contact with the surface of the surface treatment coating so as to measure a temporal change in a current and/or a voltage occurring between the surface of the surface treatment coating and the metallic substrate, and an evaluation step for evaluating a defect occurrence status of the surface treatment coating based on a waveform of the temporal change.

A corrosion-resistance testing method for a coated metal member formed of a metallic substrate provided with a surface treatment coating includes an electrification step for applying a voltage and/or a current between a surface of the surface treatment coating and the metallic substrate in a state where a corrosion factor is in contact with the surface of the surface treatment coating so as to measure a temporal change in a current and/or a voltage occurring between the surface of the surface treatment coating and the metallic substrate, and an evaluation step for evaluating a defect occurrence status of the surface treatment coating based on a waveform of the temporal change.

A corrosion-resistance testing method for a coated metal member formed of a metallic substrate provided with a surface treatment coating includes an electrification step for applying a voltage and/or a current between a surface of the surface treatment coating and the metallic substrate while a corrosion factor is in contact with the surface of the surface treatment coating so as to measure a temporal change in a current and/or a voltage occurring between the surface of the surface treatment coating and the metallic substrate, and an evaluation step for evaluating a coating quality of the surface treatment coating based on at least one of a gradient of the temporal change when a value of the current and/or the voltage exceeds a predetermined value, an integrated value of the value of the current and/or the voltage within a predetermined time range, and a time average value of the integrated value.

A corrosion-resistance testing method for a coated metal member formed of a metallic substrate provided with a surface treatment coating includes an electrification step for applying a voltage and/or a current between a surface of the surface treatment coating and the metallic substrate while a corrosion factor is in contact with the surface of the surface treatment coating so as to measure a temporal change in a current and/or a voltage occurring between the surface of the surface treatment coating and the metallic substrate, and an evaluation step for evaluating a coating quality of the surface treatment coating based on at least one of a gradient of the temporal change when a value of the current and/or the voltage exceeds a predetermined value, an integrated value of the value of the current and/or the voltage within a predetermined time range, and a time average value of the integrated value.

An electrochemical method for field monitoring of protective properties of organic coatings in seawater environment includes: Step 1: Determine the actual service environment of the coating structure and prepare the simulated electrolyte solution. Step 2: Select the anode block for testing. Step 3: Test the corrosion current and potential of the coating structure under different manual peeling areas. Step 4: Fit the peeling area model of organic coating. Step 5: Real-time monitoring of the actual service coating peeling area.

Through the method, we reached to map the deteriorating state of the organic coating to metal substrate for coating on the activity of area of the effect of stripping state recognition, resolved to organic anticorrosive coating anticorrosion performance timely and accurate assessment of the actual problem, achieved by monitoring the anode current to evaluate the organic coating stripping area. This method is scientific and has good technics and broad application value.

An electrochemical method for field monitoring of protective properties of organic coatings in seawater environment includes: Step 1: Determine the actual service environment of the coating structure and prepare the simulated electrolyte solution. Step 2: Select the anode block for testing. Step 3: Test the corrosion current and potential of the coating structure under different manual peeling areas. Step 4: Fit the peeling area model of organic coating. Step 5: Real-time monitoring of the actual service coating peeling area.

Through the method, we reached to map the deteriorating state of the organic coating to metal substrate for coating on the activity of area of the effect of stripping state recognition, resolved to organic anticorrosive coating anticorrosion performance timely and accurate assessment of the actual problem, achieved by monitoring the anode current to evaluate the organic coating stripping area. This method is scientific and has good technics and broad application value.

A test sample is extracted from a hydrogen induced cracking (HIC) resistant material candidate. A control sample is extracted from a prequalified HIC susceptible material that is known to suffer predetermined HIC damage when subjected to preset test conditions of a standardized HIC test (e.g., NACE TM0284). The HIC test is performed on the test and control samples. A value of a predetermined cracking criteria is calculated for the control sample. It is determined whether the calculated value of the predetermined cracking criteria is at least equal to a predetermined minimum threshold value. If yes, respective values of a plurality of predetermined HIC resistance criteria for the test sample are calculated. It is determined whether the calculated respective values of the plurality of predetermined HIC resistance criteria for the test sample are not greater than corresponding predetermined maximum threshold values. If yes, the HIC resistant material candidate is qualified as a valid source for sour service applications.

A test sample is extracted from a hydrogen induced cracking (HIC) resistant material candidate. A control sample is extracted from a prequalified HIC susceptible material that is known to suffer predetermined HIC damage when subjected to preset test conditions of a standardized HIC test (e.g., NACE TM0284). The HIC test is performed on the test and control samples. A value of a predetermined cracking criteria is calculated for the control sample. It is determined whether the calculated value of the predetermined cracking criteria is at least equal to a predetermined minimum threshold value. If yes, respective values of a plurality of predetermined HIC resistance criteria for the test sample are calculated. It is determined whether the calculated respective values of the plurality of predetermined HIC resistance criteria for the test sample are not greater than corresponding predetermined maximum threshold values. If yes, the HIC resistant material candidate is qualified as a valid source for sour service applications.

A housing cladding module for a medical device is provided for collision identification. The module includes resistor elements, which are arranged in and/or on the surface and which are designed such that the resistor elements change their electrical resistance on expansion. The resistor elements are arranged in such a way that the resistor elements are expanded in the event of a collision with an object. The collision is identified easily, and the effective collision force may be ascertained.

A housing cladding module for a medical device is provided for collision identification. The module includes resistor elements, which are arranged in and/or on the surface and which are designed such that the resistor elements change their electrical resistance on expansion. The resistor elements are arranged in such a way that the resistor elements are expanded in the event of a collision with an object. The collision is identified easily, and the effective collision force may be ascertained.