Describe the following types of corrosion and give a practical example of each: 1. pure chemical corrosion. 2. pure electrochemical corrosion.

Southwest Airlines has a strong financial position due to its consistent profitability and sound financial management. In 2019, the airline had a revenue of $22.4 billion and a net income of $2.3 billion. It also had a healthy balance sheet with $4.6 billion in cash and cash equivalents and $5.3 billion in long-term debt. One key factor that contributes to Southwest's financial health is its operating model, which focuses on efficiency and cost control. The airline has a low operating cost per seat mile compared to its competitors, which allows it to offer competitive fares and attract more customers. Southwest also has opportunities for growth, particularly in expanding its route network and increasing its market share. The airline has recently announced plans to expand its service to Hawaii and other international destinations, which will allow it to tap into new markets and generate more revenue. Additionally, Southwest has a strong brand and customer loyalty, which can help it attract more customers as it expands its offerings. Overall, Southwest's financial strength and efficient operating model provide a solid foundation for growth and expansion in the years to come.