This paper mainly discusses the corrosion resistance of stainless steel fasteners in Marine environment. Through experimental research, this paper introduces the experimental design, experimental process and experimental results in detail, and draws conclusions and suggestions on corrosion resistance of stainless steel fasteners. The research results of this paper will provide important reference for Marine engineering and shipbuilding.
I. Background
Corrosion in Marine environment has always been a difficult problem restricting the fields of Marine engineering and shipbuilding. Stainless steel fasteners, as a common fastener, also face serious corrosion challenges in the Marine environment. In order to better cope with the corrosion problem in the Marine environment, it is of great significance to study the corrosion resistance of stainless steel fasteners in the Marine environment.
Ii. Experiment
Experimental materials and methods
In this experiment, 304 stainless steel fasteners were selected as the research object, and the specifications were M10×1.5×8. The experimental equipment includes constant temperature and humidity test chamber, salt spray test chamber, electrochemical workstation, etc. By comparing the corrosion resistance of stainless steel fasteners under different conditions, the influence of temperature, humidity, salt spray concentration and other factors on the corrosion resistance of stainless steel fasteners was analyzed.
Experimental procedure and operation
(1) Sample pretreatment: Clean the surface of stainless steel fasteners and number them after drying.
(2) salt spray test: Put the sample into the salt spray test chamber, set different test conditions, including temperature, humidity, salt spray concentration, etc., and carry out salt spray test according to the standard requirements.
(3) Electrochemical test: Perform electrochemical test on the sample on the electrochemical workstation, record the corrosion current density, corrosion rate and other data.
Experimental results and data analysis
The following conclusions can be drawn from the experimental data:
(1) Temperature has an important impact on the corrosion resistance of stainless steel fasteners. With the increase of temperature, the corrosion resistance of stainless steel fasteners decreases.
(2) Humidity has a certain impact on the corrosion resistance of stainless steel fasteners. Under certain humidity conditions, increasing humidity has little effect on the corrosion resistance of stainless steel fasteners.
(3) The concentration of salt spray has a great impact on the corrosion resistance of stainless steel fasteners. With the increase of salt spray concentration, the corrosion resistance of stainless steel fasteners decreases.
Iii. Conclusion
This paper draws the following conclusions through experimental research:
Stainless steel fasteners have good corrosion resistance in Marine environments. However, in the environment of high temperature, high humidity and high salt spray concentration, the corrosion resistance of stainless steel fasteners will be affected.
Under certain humidity conditions, increasing humidity has little effect on the corrosion resistance of stainless steel fasteners. However, under high temperature and high salt spray concentration environment, the corrosion resistance of stainless steel fasteners will be significantly reduced.
In order to improve the corrosion resistance of stainless steel fasteners in the Marine environment, the following measures can be taken:
(1) Choose stainless steel materials with higher corrosion resistance, such as 316L stainless steel.
(2) Coating the surface of stainless steel fasteners with a protective layer, such as paint, polyurethane, etc.
(3) Optimize the structural design of stainless steel fasteners and improve the medium flow field to reduce the corrosion rate.
(4) Strengthen the manufacturing quality control of stainless steel fasteners to avoid problems such as surface defects and stress concentration.
